Posts Tagged ‘APM’

PRT @LHR 2010 – Summary of Personal Rapid Transit Conference at Heathrow Airport – Days Two and Three

Saturday, September 25th, 2010

Wednesday – Thursday 22nd – 23rd September 2010

I attended the morning tour of the PRT system thereby missing the first four Wednesday presentations. I had previously seen and ridden on the entire system. However, I had not seen the T-5 station since it was completed. It is an elegant and well-designed facility that appears to have ample space. Strolling around it, one appreciates some of the difficulties of designing for a system few will initially understand. For example, when passengers read “wait here for an empty berth” will they understand what a berth is and be able to determine where one ends and another begins? During the remainder of the tour and the ride the following morning (the system was closed for track maintenance on Wednesday morning), I paid attention to the opinions of others. Perhaps most telling was the comment of a Bombardier representative who indicated the system was much better than he had expected. I was interested in better evaluating the ride quality which, while not perfect, is definitely better than that in the back seat of a taxi.

Sven Beller, PTV AG, discussed the adaptation of existing tools such as VISUM and VISSIM to simulate PRT systems. Necessary adaptations can be scripted through the Application Programming Interface using other tools such as Excel’s Visual Basic for Applications.

Joerg Schweizer, Universita di Bologna presented work he is doing on a PRT Capacity Manual. The manual is intended to provide performance models that are quick and easy to apply with a focus on station operations.

Jochen Rabe, Associate, Ove Arup & Partners Ltd., said that comprehensive PRT networks covering entire cities may not be realistic. Local authorities must compare the transport service benefits of PRT with the visual impact and potential privacy loss.

Gabriele Giustiniani, Researcher, University of Rome ‘La Spienza’, outlined a CityMobil project with a round trip of 1.61km, 11 stops and 6 cybercars. He found the mode share for the cybercars was 10% more than that for a mini bus with the same schedule.

Steve Perliss, Lea+Elliott moderated a Procurement Workshop which included addresses from Bo Olsson, Senior Strategist, Trafikverket, David Holdcroft, PRT Manager, BAA, Martin Lowson, President, ULTra PRT, Robbert Lohman, Commercial Director, 2getthere and Jorgen Gustafsson, Managing Director, Vectus Ltd. Olsson described a two-step procurement process (first qualifications, then price) and said numerous questions must be answered before committing to a procurement process. Holdcroft described the process used to select ULTra. He said they received 15 responses. Lowson and Lohman implied they approved of the BAA procurement process. Perliss said it is important to give responders time to build teams and to bring them in early to get feedback. Ahuja said this is not possible in India where the tender period is limited to 6-8 weeks. Lowson and Lohmann agreed that the supplier must have control of the structural specifications to ensure ride quality and vehicle interfaces are adequate. Gustafsson said clear roles and responsibilities with simple interfaces and a lean organization able to make quick decisions (especially on the client side) were important. He said the Suncheon project will comprise 11km, 40 vehicles with 3M annual visitors. It will be mainly point-to-point and is being financed by Vectus who will receive an annual stipend. Muller pointed out that the workshop seemed to be moving towards guidance for consultants in preparing tender documents and that guidance for owners in moving from considering to implementing PRT was perhaps also needed. Lowson stated that, in his opinion, the ASCE APM standards are insufficient on the topic of safety and that safety clearance requirements vary greatly from country to country and even within some countries like the U.S.A.

Simon Babes, Director, Colin Buchanan, discussed a potential role for PRT in the Chinese megacity of Shanghai. He presented an analysis of a 20km, 20 station PRT system with 500 vehicles and 67,000 daily trips connecting a business park to a metro station. He anticipated fare revenues plus savings in shuttle bus operating costs could cover PRT operating costs and pay back the capital investment in five to ten years.

Richard Caple, Engineer Project Manager, Daventry District Council, said the major concerns for the Daventry PRT project include: visual intrusion; cost; anti-social behavior; ease of use and the complexity of the network. There is no funding presently available but he expects the system will happen eventually. He briefly outlined a document called Outlines for the Implementation of PRT in Urban Areas.

Peter Muller, President, PRT Consulting (the author), suggested that the true benefits of PRT will only be realized when it is used to develop entirely new cities built with a focus on ideal living conditions along with sustainability. He outlined how his vision for a “perfect” city could be enabled by PRT and recommended that those attempting to retrofit existing cities with PRT might want to keep this vision in mind, as something to strive towards. A poll of the audience revealed that about 75% would like to live in such a city.

Colin Bates, Managing Director, Customer Champions reported on a study of ULTra’s previous leads and key contacts. They found that the key barriers to sales were: risk aversion; desire not to be first (Heathrow will help but is not always applicable); urban developments are impacted by politics; PRT is not understood by decision makers; there is a lack of comparable data and proven benefits.

Malcolm Buchanan, Director, Colin Buchanan, summarized the conference. He asked if roads and cars or rail networks could eventually become PRT networks.

PRT @LHR 2010 – Summary of Personal Rapid Transit Conference at Heathrow Airport – Day One

Tuesday, September 21st, 2010

Tuesday 21st September 2010

The Conference was opened by John Holland-Kaye, Commercial Director, BAA Airports, who said that the PRT system is obtaining 100% records for reliability. He was excited by the chance to create a new form of technology that will change the way people travel.

Fraser Brown, Head of Travel Services, Heathrow Airport Ltd – BAA, listed numerous advantages of the PRT system including: predictable; reduction in journey times; more than 70% have no waiting; reductions in emissions, noise and congestion; improved office rents, land values & availability as well as road safety. He is looking forward to a future where the passenger needs no local knowledge – they will not need to know where they have to go, just what they want to do. The system should be able to account for congestions, last-minute changes and delays in flight schedules.

David Holdcroft, PRT Manager, BAA, outlined completed and on-going system testing and passenger trials. He said that they have found out from passenger trials to date that passengers like the system. They also have learned that there are many aspects of the system that can be improved and have been tweaking such things as the audio message volume, door timings and button sequences. The on-going daily trials include passengers with luggage and are being used to monitor trends in the system status. The recent emergency situation rehearsal provided valuable lessons including that it resulted in duplicative responses from multiple jurisdictions. The system will open once BAA is satisfied with the results of daily trials and full integration of the PRT system with all other airport systems that could interact with it in any way. The integration process involves safety integration, new and updated operations protocols and familiarization of all potentially impacted airport staff.

Mark Griffiths, Head of Operations, ULTra PRT, continued the theme David Holdcroft started and told of unexpected passenger behaviors, such as going to an empty station berth to call a vehicle because they mistakenly assumed the one already waiting in a berth must be broken. He said they have a core staff of 24 for the 24/7 operation. Batteries must be recycled after about 3 months. Opportunity charging in stations allows a full battery pack to keep a vehicle running for several hours.

The Masdar PRT system had a two-hour test last week with 10 vehicles and 25 passengers according to Robbert Lohmann, Commercial Director, 2getthere. He said they put doors on one side of the vehicles only because doors tend to be problematic. However, this has required some special station layouts. When asked about rumors that Masdar is considering abandoning the PRT system for electric cars or other solutions, he said that Masdar is still committed to the PRT system but continually reconsidering their options because of the state of the economy.

Dario Menichetti with Mott MacDonald discussed the modeling of the MASDAR PRT system. They used conventional transportation modeling tools as well as a micro-simulation model in order to model the integrated systems and optimize the PRT topology and network performance.

Michel Parent, Team Manager, INRIA, said that cyber cars are fully-automated individual road vehicles that are part of an optimized transportation system but are not necessarily separated from other traffic. He described a cyber-car demonstration that will run for 6 months (January to June, 2011) with three vehicles in La Rochelle, France.

Tony Kerr, Director, Ove Arup & Partners Ltd., reported that they are now under contract and beginning work on the San José PRT project. The initial portion of the project will include investigating a PRT system connecting the airport to light- and commuter-rail stations.

Magnus Hunhammer, CEO, Institute for Sustainable Transportation described how they have used a full- scale portable PRT station to publicize and educate people about PRT. He also showed a PRT visualization.

John Hammersley with ULTra PRT discussed planning efforts and competition for a PRT system in the historic city of Bath. He said the competition led to overwhelmingly positive response and the PRT system could pay for operating costs and provide a return on investment of 7.3% based on a very reasonable fare.

Henk van Zuylen of The University of Technology, Delft described a PRT system connecting the Airport of Rotterdam and The Hague with existing rail and Scienceport Holland. The 21 km system would have 14 stations and 70 vehicles. Capital costs were estimated at €109M and annual O&M costs at €1.7M. He said the real barriers are institutional and political.

Sonal Ahuja, Director International Development, Capita Symonds Ltd., said there are 17 to 18 PRT projects currently being taken seriously in India where there is no recession and people pay for purchases in cash. He described a PRT study in New Delhi where they had to resort to double guideways to accommodate projected demand using 3 second headways and an occupancy factor of 3.0. The study showed a benefit/cost ratio of 4 and an internal rate of return of 18%.

Martin Lowson, President, ULTRa PRT discussed the design of a high capacity PRT station. He said they have found loading and unloading times to be quite consistent with that on other modes. Door cycle times tend to dominate station dwell times. Station designs can minimize the number of bays required by keeping standby vehicles close by in order to immediately replace departing vehicles.

Arturo Dávila, Project Engineer, IADIADA Automotive Technology SA, described a vehicle platooning system called SAfe Road TRains for the Environment (SARTRE) where the lead vehicle is driven and following ones are driverless. The intent is to increase safety and capacity while reducing energy used.

Ingmar Andréasson, Professor, KTH, discussed the ridership effects of PRT mixed with scheduled transit. He found that conventional transit is inadequate and PRT can increase total transit share and induce more travelling. In order to estimate the new transit share including PRT, all we need to know is the transit disutility and how much it is going to change, if the other modes are going to remain unchanged. He found the bus penalty relative to car to be € 2.50 and the PRT penalty to be half that, when the entire trip is by PRT.

Modern Mobility, What is PRT and Why You Should Care

Wednesday, May 5th, 2010

Judging by the rapt attention (at times you could hear a pin drop) and the lively discussions during the breaks, the Modern Mobility Conference, held near Kansas City on April 23rd, 2010, was a resounding success. The conference was moderated by Stan Young, President of the Advanced Transit Association (ATRA) and marked the culmination of a project investigating the feasibility of a PRT system at the Village West development east of Kansas City.

Mokhtee Ahmad, Regional Administrator, FTA Region 7 welcomed the attendees. While expressing caution about the willingness of FTA to embrace PRT, he privately stated that PRT projects are eligible for FTA New Starts funding.

 ATRA board member and events coordinator, Larry Fabian, introduced the topic of automated people movers (APM). He stated that there are 146 worldwide of which 4 are PRT. APMs have historically been noted for their high costs. While PRT systems may require more sophisticated control systems, they will hopefully also reduce costs.

Peter Muller, president of PRT Consulting rounded out the first session with an introduction to PRT planning. He began by outlining how cars are ruining our cities by contributing to congestion, killing over 40,000 per year, contributing a third of all greenhouse gases, using more oil than all other uses combined and devouring property (at Village West four times as much land is devoted to roads and parking as to buildings). Conventional transit is no solution since transit’s mode share has barely changed in the last 20 years. He then outlined how PRT’s characteristics may allow it to address many of these problems.

Mr. Muller went on to educate the attendees in the technical aspects of PRT and how it should be planned for. He stressed that public participation can be key in dealing with potential nay-sayers early in a project. He outlined a public outreach process that has shown that people generally prefer small, private modes of transport such as cars, bicycles and PRT over rail-based modes and that the least-preferred modes are bus-based.

 The second session was focused on reporting on the results of the Village West PRT Project. Dr. Moni Al Aasar reported on BG Consultant’s analysis of structural and code compliance issues. He stated that the Kansas DOT had concerns about the ULTra guideway design as used at Cardiff and Heathrow. These concerns related to the fracture-critical, non-redundant nature of the design and the fact that it has out-of-plane loading. BG Consultants developed an alternative pre-cast concrete guideway design and Dr. El-Aasar presented estimated guideway costs based on this design. He also presented estimated costs for stations as shown in Table 1.

Table 1. Probable Construction Costs

 

Probable Construction Costs

Item

At-Grade

Elevated

Guideway/mile

$1.33M

$4.4M

2-bay Station

$48,000

$362,000

3-bay Station

$69,000

$465,000

 Dr. Steven Schrock, Assistant Professor at the University of Kansas, reported on the environmental aspects of the Village West PRT Project. No major environmental concerns are anticipated but NEPA requirements will have to be met if federal funding is involved. He discussed the methodology used to estimate the value of benefits deriving from reductions in automobile operating costs, onsite emissions and accident costs.

 Peter Muller reported on the work done to estimate ridership, system requirements, overall benefits and costs. In addition, he reported that Patti Banks Associates found that quite significant land redevelopment options become available through retrofitting the area with a PRT system. They also found that even more significant opportunities would have been available had the development incorporated PRT from the beginning.

 Mr. Muller stated that the benefits (including societal non-monetize-able benefits) outweighed the costs by some two-and-a-half times. Increased tax revenues plus a per-ride charge of about $0.50 would be sufficient to pay for capital costs in ten years. Ongoing operating costs would thereafter require a fare of approximately $1.00 per trip. He presented a comparison (shown in Table 2) comparing the viability of this project with another PRT project, a light rail project and a commuter rail project.

In summary, the PRT system seems viable and financially feasible. However, the study, which was undertaken as an academic exercise, had insufficient budget with which to adequately investigate important factors such as ridership, increased tax revenues and financing mechanisms.

Table 2. Cost Comparisons

 

  Dulles Rail Project Mid-Jordan LRT Extension Fort Carson PRT Project Village West PRT Project
Miles of track 23 (2-way) 11 (2-way) 23 (1-way) 10 (1-way)
Stations 11 9 35 26
Daily  pax 60,000 9,500 53,500 15,519
Capital cost $5,200M $428M $529M $137M
Cost per mile $113M $19M $23M $14M
Cost per station $473M $48M $15M $5M
Cost per annual pax $290 $150 $33 $24
Type Corridor Corridor Network Network

Perhaps the most interesting part of the conference was the closing panel discussion moderated by retired Professor Alan Black. Tom Jacobs with the Mid-America Regional Council (MARC) said that transit is the number one solution they are working on. He was very impressed with the attributes and benefits of the PRT system and thought it was really compelling from an environmental standpoint. He considers the 60 to 200 square miles of parking lots within the MARC area to be environmentally damaging due to heat island effects, ozone emissions and increased storm water runoff. He saw promise in PRT’s ability to create vital spaces.

Douglas Bach, The Unified Government of Wyandotte County’s Deputy County Administrator, said that existing remote parking could be used if a PRT system was in place and that there are more and more reasons to park the car and travel around the facility. He felt that the system itself could be an attraction, but implementing it would be challenging. STAR bonds may be difficult to use because of restrictions. However, the recently enabled Community Improvement District has more flexibility on both the taxing and spending sides.

Dick Jarrold with the Kansas City Area Transportation Authority discussed how PRT could help solve the last mile problem experienced by larger systems. However, he expressed concerns regarding the need to verify costs, aesthetics, ridership, security, safety and impact on/of underground utilities. He said that, if the numbers are correct, Village West would be the type of facility at which to implement PRT. The big question is, “who bears the risk if it does not pan out?”

 Dick McReynolds, retired KDOT researcher encouraged the group not to get too hung up on specific costs or issues. This project was funded at about one tenth the usual costs and the results are quite encouraging.

Chris Ozimek, Director of Marketing for Schlitterbahn, explained that while a small portion opened last year, the 270 acre resort will take another four to five years to complete. It includes over four miles of waterways [which the PRT system would connect to]. The resort is designed to have people park and leave their cars for the duration of their stay. PRT could take this to a whole new level and increase the average length of stay.

Passenger Terminal Expo 2010 – Summary of PRT Presentations

Friday, March 26th, 2010

Heathrow’s PRT system: an update on progress. David Holdcroft, PRT Manager, BAA.

The Heathrow system has 21 vehicles. They currently have 12 to 13 running at a time. PRT has proven to be very space efficient requiring the relocation of a portion of perimeter fence only.

They have had some software and destination panel glitches. They are planning a full emergency exercise in mid May with the full system opening in late spring followed by a 1 year review process.

BAA is branding the system as the Heathrow Pod – a new travel experience – smart, personal and friendly. The new color scheme includes purple on the lower portion of the vehicles.

They have had a lot of interest in 3rd party sponsorship but passengers do not want internal advertising. They anticipate increasing the charge for parking once the system is operational.

They are considering adding automated way-finding where the rider enters their flight number, airline or car-hire company and the systems knows where to take them.

Snow and ice is dealt with by a special vehicle fitted with snow plows and deicing sprayers. This vehicle can continuously circulate around the system in inclement weather. The objective is to not have the system shut down before the roads do.

They have found that people want to share rides with others. This may become an issue that needs to be dealt with once more destinations become available. Having specific berths dedicated to particular routes may be a solution.

Once the system is open to the general public anyone will be able to use it from Terminal 5.

Insurance of the system has been no problem and is just part of the airport’s regular policies.

Personal rapid transit: how is safety assured? Christopher Elliott, Director, Pitchill Consulting, Ltd.

The Heathrow PRT system carried its first “real” passengers (members of the public participating in passenger trials) last week after receiving safety certification to do so. Final sign-off will be required before the system enters revenue service in June. The system is now real and transportation planners have to take it seriously.

The safety requirements for new transportation systems are much higher than those for existing systems. If introduced today, existing systems would never meet modern safety requirements. Modern systems have to be safe and be seen to be safe.

A good safety system leads to reliability. The Heathrow system safety goal is less than 10-3 fatalities per year (less than one fatality every thousand years).

Both leading PRT systems (ULTra & 2getthere) have built safety into their designs and are having it verified through independent certification.

PRT systems in an APM world. Thomas Ludwig, Head of Automated People Mover Services, Logplan.

PRT will be primarily a landside system with conventional automated people movers (APMs) being primarily airside. PRT competes more directly with cars and buses and is more suitable for landside. However, the cost/benefit of PRT could impact APM systems.

Translating lessons learned at Masdar into an airport environment.  Robbert Lohman, Marketing Director, 2getthere.

Benefits of PRT at airports include improved service, cost effectiveness, sustainable and green, makes new connections possible and provides improved accessibility.

All 2getthere vehicles have obstacle detection and will stop for a person on the guideway. Destination selection can be accomplished either outside or inside the vehicle. A blue medical assistance button will redirect the vehicle to the best station and alert responders that it is coming. The technology is now at an advanced stage and having the right people involved is more of a risk than the technology is.

The Masdar safety case is similar to the one for Rivium. Lloyds Register is currently verifying safety.

Masdar stations are not air conditioned and heat gain is a problem. Vehicles connect to a charging plate at berths to allow the air conditioning to keep running. Doors close after 4 to 5 seconds with no one entering or exiting. Dust and corrosion mitigation measures seem to be working.

The first phase at Masdar has 1.5 km of track, 2 passenger stations, 3 freight stations, 8 standard vehicles, 2 VIP vehicles and 3 freight vehicles. The ultimate system is planned for 45 km of track, 2,100 vehicles, 90 passenger stations and 100 freight stations. The current control system configuration can control 100 to 200 vehicles.

The perspective of cities. Suzanne Hoadley Membership Services Coordinator, Polis.

Daventry is still interested in PRT.

Cities considering PRT face the following challenges: legal, certification, risk aversion, visual intrusion, financial and societal.

PRT: the business case and revenue generation. Martin Lowson, Vice Chairman, Advanced Transport Systems, Ltd.

PRT typically reduces commute times by about ten minutes. The literature provides a number of studies indicating what the value of time is. Airport value of time is double that for other applications.

A study of all UK airport car parks found people pay £1.49 extra per stay for every minute they can park closer to the terminal. A good business case can be made for PRT for lots with more than 4,000 spaces that are close in and more than 6,000 spaces further out (10km). 18 hotel data points indicate room rates increase £3 – £6 per minute closer to the airport.

Various studies indicate home values increase 21% on average when they have good light rail access. Commercial properties increase 23% – 120% on average. Property value gain is $65M per km of track.

Master Plan Personal Rapid Transit Analysis for Baltimore/Washington International  Thurgood Marshall Airport. Peter Muller, President, PRT Consulting, Inc.

The purpose of the study was to investigate conceptual feasibility of PRT for: surface transport garages to terminals, secure inter-concourse travel, expansion to surface lots, LRT, Amtrak & the consolidated rent-a-car facility (CONRAC).

The following assumptions were made: speeds 15mph close in and 25 mph further out, minimum headways 2 and 3 seconds respectively, maximum theoretical capacities 3,600 and 2,400 passengers per hour per direction respectively. The system comprised 3.6 miles of dual-lane guideway, 7.7 miles of single-lane guideway, and 37 stations. 517 T-Pods were found to be necessary to provide an adequate level of service to the projected daily ridership of approximately 60,000 passengers.

The capital cost of $387M was compared to the capital cost of an APM ($1,194M) that had previously been studied to provide similar service. In addition to having a significantly lower capital cost, the podcar system had shorter trip times, provided seated travel for all and had the capability to deliver passengers inside the terminal building. It also had the potential to provide a loop serving the secure portion of the terminal/concourses. It was postulated that it could be satisfactorily demonstrated to the TSA that passengers entering the system at a non-secure station would not be able to exit at a secure station.

In addition to having lower capital and operating costs than the planned APM system, the PRT system was found to have operating costs of around 60% of those of the present bus service. It was speculated that it could potentially attract more cars to the long term surface lots and boost concession sales in the concourses.

The master plan, of which this study formed a small part, has not yet been adopted by the airport.

Vectus PRT operational experience applied at airports. Jörgen Gustafssen, Chief Technology Officer, Vectus Ltd.

Vectus safety complies with APM standards and is verified by a subsidiary of Lloyds Register. The system operates under distributed asynchronous control with a dynamic moving block vehicle protection system. They have no obstacle detection and have designed the guideway to be inaccessible.

Vectus uses a high-vehicle-flow station design with in-line bays. It is full duplex (board and de-board in the same location). They have found it important to have a spacious vehicle with good access. Their vehicle can be fitted with six seats. They have found actual boarding times to be less than anticipated. A 4-berth station can accommodate 8 – 12 vehicles per minute.

They are investigating a combined vehicle arrangement with 6 – 10 seats and room for 20-30 standing.

The Suncheon system will have 11km of track and 40 vehicles. It is mainly point-to-point but may have three stations. They hope the letter of intent will be finalized in a few weeks. Operations are scheduled to start in February 2013. It is a private-public-partnership.

Today’s airport innovations – tomorrow’s urban transportation systems. Malcolm Buchanan, Director Transport Planning, Colin Buchanan and Partners.

Airports and historic towns have a lot of similarities including congestion and remote parking issues.

Taxi earnings can be an important indicator of the potential for transit improvements.

Connecting terminals to the airport landside. David Little, Principal, Lea + Elliott Inc.

The accessibility, weight and small turning radius of PRT is an advantage. PRT development is such that it is now available within normal project implementation time frames.

15 PRT Papers at the 12th Intl APM Conference

Monday, June 8th, 2009
 

 

There were 15 papers focused on personal rapid transit (PRT) at the 12th International Conference on Automated People Movers held in Atlanta May 31 – June 3, 2009. The proceedings are bound in a 600-page book that can be obtained from the American Society of Civil Engineers.

 In her paper titled Sustainability, PRT and Parking, Shannon Sanders McDonald presented options for parking garages linked to PRT to provide fully sustainable approaches to integrating transit into the urban fabric.

I presented a paper on station options for open-guideway PRT systems. http://www.prtconsulting.com/docs/PRTStationsMullerAPM09.pdf These types of systems are typically more flexible than captive-bogey or suspended systems and a variety of ways of incorporating stations into existing or new developments were illustrated and explained. I presented a suggestion (not included in my paper) to consider grade-separated overpasses in place of merge/diverge figure-of-eight guideway layouts for reasons of capacity, time, capital and operational costs savings. This paper shared a $500 Best Paper award with Shannon’s.

  

Building station

Building station

Urban Elevated Guideway Station

Urban Elevated Guideway Station

 Robbert Lohman presented a paper based on the PRT system being deployed in the zero-carbon, zero-emission City of Masdar in the UAE. It answered such questions as “How would you build a city if you could start from scratch? With sustainability in the back of your mind, would you still allow access to cars? If not, how would you accommodate mobility of people and goods? Would you be able to with today’s technology?” He concluded that the advantages of including PRT in the transportation mix include energy savings, environmental friendliness and the huge reduction in space required for transit systems – allowing the space to be used for other purposes. The initial PRT system is scheduled for passenger service later this year.

 

2getthere T-Pod for Masdar City

2getthere T-Pod for Masdar City

 

 

 

 

 

 

 

 

Jörgen Gustafsson discussed the Vectus PRT concept and test track experience. The Vectus test program in Sweden has included two full winter seasons and has proven the system’s capability to cope with various snow and ice conditions. They have successfully proven the control concept using distributed asynchronous control based on a dynamic moving –block vehicle protection system along with receiving safety approval for all other aspects of the PRT system at a 3-second headway and speeds of 45 km/h.

 

Vectus Snowslinger

Vectus Snowslinger

 
 

 

 

 

 

 

 

 

 

 

Göran Tegnér presented a paper summarizing a Swedish research project examining how a doubled transit ridership by podcars could be financed. He showed that it would be possible to double the transit ridership in cities with bus or LRT traffic when shifting to podcars. The cost per trip was shown to be lower by podcar than LRT and – in some cases – than bus.

David Holdcroft presented a very well attended paper updating the progress on the Heathrow PRT system. This system is now up and running under test. It has about 2 miles of guideway, three stations and 18 T-Pods. Passenger service will be phased in starting with BAA employees, then adding business car park users and finally the general public. Full public service is anticipated to be in place late this year.

 

ULTra T-Pod at Heathrow Airport

ULTra T-Pod at Heathrow Airport

 

 

 

 

 

 

 

 

 

 

 Stan Young presented a paper (which I co-authored) about a case study we are undertaking at Village West Development in Kansas City, Kansas. The study found that the Kansas DOT did not approve of the ULTra guideway structural design but an acceptable precast concrete alternative was developed that had similar costs. Potential funding mechanisms for a PRT system do exist in the area but the viability of a PRT retrofit has yet to be explored. It does appear that numerous benefits would have derived had the PRT system been incorporated into the design from the beginning.

  

Proposed PRT Layout

Proposed PRT Layout

 

 

 

 

 

 

 

 

 

 

 

My paper, Personal Rapid Transit’s Impact on Army Base Sustainability http://www.prtconsulting.com/docs/PRTArmyBaseSustainabilityFinal21909.pdf was based on a study we did for the U.S. Army Post at Fort Carson, Colorado Springs. The results were remarkably positive considering the sprawling layout of the Post. We found a benefit/cost ratio of 2.75 and that a fare of under $2.00 per ride would cover both operating costs and annualized capital costs. The following table compares our findings with those of two recently-announced conventional transit projects.

 

 

Mid-Jordan LRT Extension

Dulles Rail Project

Fort Carson PRT Project

Miles of track

11 (two-way)

23 (two-way)

23 (one-way)

Stations

9

11

35

Daily passengers

9,500

60,000

53,500

Capital cost

$428M

$5,200M

$522M

Cost per mile

$19M

$113M

$23M

Cost per station

$48M

$473M

$15M

Cost per annual passenger

$150

$290

$33

 

Steve Raney presented concepts for a PRT Circulator for Pleasanton and Perimeter Center. Both locations are edge cities associated with larger cities. In both cases PRT could increase transit ridership and reduce single occupant vehicle use. PRT provides a good last-mile solution and also helps prevent employees who don’t use cars for their commute from being stuck at their desks in the lunch hour. After the conference, Steve and I presented these concepts to Perimeter Center stakeholders where they were very well received.

 

Tony Kerr discussed lessons learned on the Heathrow PRT Guideway. The paper is very useful because it addresses elevated as well as at-grade guideways and covers a range of issues such as modular design, guardrail requirements and tolerances required for ride comfort. He indicated that PRT guideways require tighter tolerances than usual in civil engineering works and that provisions for fine adjustments to the running surface should be made.

J. Edward Anderson presented a paper titled “How to Design a PRT Guideway”. He argued that in most cases, the design of the guideway has been more or less an afterthought. The purpose of his paper was to stress the importance of adequate consideration of guideway design requirements and criteria. He listed 33 PRT guideway design requirements, discussed issues and tradeoffs and presented 19 PRT guideway design criteria before drawing detailed conclusions.

Ray MacDonald argued for high capacity PRT standardization. He was concerned that the technology is becoming divided into low capacity PRT following APM criteria (e.g. brick wall stopping requirements) and high capacity PRT rejecting these requirements. He considered low capacity PRT to not be financially feasible and urged standardization around high capacity PRT, even if used initially for low capacity applications.

John Lees-Miller presented a well-illustrated discussion of the potential for ride sharing in PRT. He stated that, in order to promote ride sharing it is very important to generate an environment that encourages it. He also showed that ride sharing becomes less effective as the number of potential destinations increases.

 

Wait Time vs. No. of Destinations

Wait Time vs. No. of Destinations

 

 

 

 

 

 

 

 

 

 

 

 

Ingmar Andreasson presented a paper titled “Extending PRT Capabilities” in which he examined various ways of increasing PRT capacity without reducing headway. He discussed three different ways of increasing capacity – ride-sharing, platooning of empties (since there is no safety reason not to run empties at very short headways) and pair-coupling (trains of two occupied vehicles). His results are tabulated below:

Feature

Capacity Improvement Factor

Ride-sharing

1.5 – 2.1

Platooning of empties

1.15 – 1.25

Pair-coupling

1.5 – 1.9

 

He suggested that combining all three features could increase capacity by a factor of 3 above the basic 1,200 passengers per hour per direction for a system with a 3-second headway.

Finally Jun-Ho Lee presented a paper on PRT computer simulation. He proposed an apparatus making it possible to directly evaluate vehicle operation characteristics on the guideway using real hardware. This could reduce the time for the development, implementation and evaluation of the operational control algorithm for PRT.