DEMAND-RESPONSIVE TRANSPORTATION SYSTEMS
Special Report 136 Highway Research Board National Research Council National Academy of Sciences National Academy of Engineering
I
•. , __;• -•-, .- HIGHWAY RESEARCH BOARD 1973
Officers James A. Moe, Director, California Department of Public Works William L. Garrison, Chairman Elliott W. Montroll, Albert Einstein Professor of Jay W. Brown, First Vice Chairman Physics, University of Rochester Milton Pikarsky, Second Vice Chairman Milton Pikarsky, Commissioner of Public Works, W. N. Carey, Jr., Executive Director Chicago David H. Stevens, Commissioner, Maine Department of Transportation Executive Committee B. R. Stokes, General Manager, San Francisco Bay Area Rapid Transit District Ralph R. Bartelsmeyer, Federal Highway Administra- Robert N. Young, Executive Director, Regional Plan- tor, U.S. Department of Transportation ning Council, Baltimore (ex officio) Frank C. Herrmger, Urban Mass Transportation Ad- ministrator (ex officio) Henrik E. Stafseth, Executive Director, American Association of State Highway Officials (ex officio) Ernst Weber, Chairman, Division of Engineering, Na- tional Research Council (ex officio) Charles E. Shumate, Executive Director, Colorado Department of Highways (ex officio, Past Chair- man, 1971) Alan M. Voorhees, President, Alan M. Voorhees and Associates, Inc. (ex officio, Past Chairman, 1972) Hendrik W. Bode, Gordon McKay Professor of Sys- tems Engineering, Harvard University Jay W. Brown, Director of Road Operations, Florida Department of Transportation W. J. Burmeister, Executive Director, Wisconsin As- phalt Pavement Association Douglas B. Fugate, Commissioner, Virginia Depart- ment of Highways William L. Garrison, Edward R. Weidlein Professor of EnvirQnmental Engineering, University of Pittsburgh Roger N. Gilman, Director of Planning and 11evelop- meit, The Port Authority of New York and New Jersey Neil V. Hakala, President, Esso Research and Engi- neering Company Robert N. Hunter, Chief Engineer, Missouri State Highway Commission George Krambles, Operating Manager, Chicago Transit Authority A. Scheffer Lang, Office of the President, Association. of American Railroads Saunders Mac Lane, Max Mason Distinguished Service Professor, Department of Mathematics, The Uni- versity of Chicago Harold L. Michael, School of Civil Engineering, Pur- due University D. Grant Mickle, President, Highway Users Federation for Safety and Mobility John T. Middleton, Consultant, Washington, D.C. DEMAND-RESPONSIVE TRANSPORTATION SYSTEMS
Special Report 136
Proceedings of a conference held June 12-14, 1972, at Ann Arbor, Michigan
Subject Area:
84 Urban Transportation Systems
Highway Research Board Division of Engineering National Research Council National Academy of Sciences National Academy of Engineering Washington, D.C., 1973 NOTICE
The conference reported herein was held under the aegis of the National Academy of Sciences-National Research Council with the approval of the Governing Board of the NRC. Such approval indicated that the Governing Board considered that the problem is of national significance, that solution of the problem required scientific or technical competence, and that the resources of NRC were particularly suitable to the conduct of the project. The institutional responsibil- ities of the NRC were then discharged in the follow- ing manner: The members of the conference com- mittee were selected for their individual scholarly competence and judgment, with due consideration for the balance and breadth of disciplines. Responsi- bility for all aspects of this report rests with the com- mittee, except that opinions and conclusions attributed in the report to individuals are not necessarily those of the committee, the Highway Research Board, or the National Research Council. Although the reports of Highway Research Board committees are not submitted for approval to the Academy membership or to the Council of the Acad- emy, each report is reviewed by a second group of appropriately qualified individuals according to pro- cedures established and monitored by the Academy's Report Review Committee. Such reviews are intended to determine, inter alia, whether the major questions and relevant points of view have been addressed and whether the reported findings, conclusions, and rec- ommendations arose from the available data and in- formation Distribution of the report is approved, by the President of the Academy, only after satisfactory completion of this review process.
ISBN 0-309-02099-9 Library of Congress Catalog Card No. 73-2355 Price: $3.60
Available from Highway Research Board, National Academy of Sciences, 2101 Constitution Avenue, N.W., Washington, D.C. 20418. CONTENTS
FOREWORD, Leon M. Cole v DIAL-A-RIDE PROJECT IN ANN ARBOR: LEGALITY, Jerold Lax 68 INTRODUCTION, Daniel Roos 1
DIAL-A-BUS: GUIDELINES FOR DE- General Issues SIGN AND IMPLEMENTATION 3 DEMAND-RESPONSIVE TRANSPOR- TATION AS SEEN BY THE TRANSIT WORKER, John M. Elliott 75 Implementation of Specific Systems FORD MOTOR COMPANY'S ROLE IN DIAL-A-BUS EXPERIMENT IN BAY DIAL-A-RIDE DEVELOPMENT: 1972 RIDGES, John A. Bonsall 10 AND BEYOND, Karl W. Guenther 80
TELEBUS PROJECT IN REGINA, USER PREFERENCES FOR DIAL-A- Wallace G. Atkinson 16 BUS, Richard L. Gustafson and Francis P. D. Navin 85 B-LINE DIAL-A-BUS SYSTEM IN BATAVIA, Robert P. Aex 23
MODEL CITIES DIAL-A-RIDE SYSTEM Dispatching Systems IN COLUMBUS, OHIO, William C. Habig 27 COMPUTERS, TAXIS, AND GRASS ROOTS TRANSPORTATION, Robert C. MODEL CITIES JITNEY TRANSPOR- Cherry 94 TATION IN BUFFALO, Michael White 31 USE OF DATA PROCESSING IN TAXI- CAB CONTROL, John Davidson 99 DIAL-A-RIDE APPLICATION IN GREAT BRITAIN, Philip R. Oxley 33 GENERAL PURPOSE COMPUTER DIS- PATCHING SYSTEM, Nigel H. M. DIAL-A-RIDE DEMONSTRATION IN Wilson and Bernard Trevor HADDONFIELD, D. W. Gwynn and Higonnet 102 Anthony U. Simpson 38
DIAL-A-RIDE DEMONSTRATION IN Banquet Speech HADDONFIELD: PLANNING AND INI- TIAL OPERATION, Douglas M. ISSUES AND POLICY QUESTIONS CON- Medville 44 FRONTING PUBLIC TRANSPORTATION, Elbert C. Mackey 105 DIAL-A-RIDE PROJECT IN ANN ARBOR: DESCRIPTION AND OPERA- TION, Thomas Urbanik, II 53 Participants 110 DIAL-A-RIDE PROJECT IN ANN ARBOR: PUBLIC RESPONSE, Michael J. Berla 61 Sponsorship 113 FOREWORD Leon M. Cole Professor and Director, Graduate Program in Community and Regional Planning, University of Texas at Austin
Research on demand-responsive trans- of Technology and the HRB Committee on portation concepts began in the 1960's and New Transportation Systems and Tech- was first widely reported in "Tomorrow's nology were joint sponsors, and the Ann Transportation: New Systems for the Arbor Transportation Authority and the Urban Future," the summary report of Highway Safety Research Institute of the extensive studies on new systems of ur- University of Michigan also participated. ban transportation conducted by the U.S. More than 125 persons from transit and Department of Housing and Urban Devel- taxi industries, labor unions, manufac- opment and published in 1968. That re- turers, government, consulting firms, port identified demand-responsive trans- and universities attended. In addition to portation as the most promising new papers and discussions, field trips were concept that could be implemented in the scheduled to inspect the Ann Arbor relatively near future. demand-responsive system and also the The Massachusetts Institute of Tech- work being done by Bendix, Ford, and nology, a major contributor to the early General Motors. research of such concepts, sponsored The Committee on New Transportation the First Annual Conference on Demand- Systems and Technology is pleased to Responsive Transportation Systems in sponsor this publication of the conference the summer of 1970. That was a 1-day proceedings. It is the second in a series conference at which M. I. T. researchers of reports on demand-responsive systems presented their findings. In September and services. The first, "Demand- 1970, the Highway Research Board's Actuated Transportation Systems," Special Committee on New Transportation Sys- Report 124, contains the proceedings of tems and Technology and Purdue Univer- the 1970 Purdue Conference. We are sity sponsored a 2-day conference that aware of the widespread current interest brought together both researchers and in information about changing develop- operators of demand-responsive transrans-- ments in demand-responsive transpor- portation. By the summer of 1971, 3 tation. The material in this report, pre- demand-responsive systems had been pared by such a broad cross section of implemented and several other systems people who have been gaining experience were planned for implementation during and learning lessons in implementing the next year. Reports were given on innovative transportation systems con- these systems at the Second Annual Con- cepts, represents the most current in- ference on Demand-Responsive Trans- formation of its kind on demand-responsive portation Systems, a 2-day conference transportation installations. sponsored by M.I.T. in the summer of 1971. Because interest in demand-responsive transportation continued to increase and because conferences served as one of the best communication channels between operators and researchers, the Third Annual Conference on Demand-Responsive Transportation Systems was held in June 1972. This special report contains the presentations and discussions of that conference. The Massachusetts Institute INTRODUCTION
Daniel Roos Associate Professor, Department of Civil Engineering, Massachusetts Institute of Technology
Demand- responsive transportation publication, but others represent tran- systems provide flexible personalized scripts of oral presentations. The latter point-to-point service in response to in- were edited by the conference committee dividual travel requests. Typically, chairman and by the HRB editorial staff there are no fixed routes and schedules. for clarity and conciseness. Instead, a dispatching center receives Bonsai described the oldest imple- telephone calls from customers and as- mented demand-responsive system, which signs vehicles to service the customers. is in Bay Ridges, Ontario. That system The objective of the dispatching opera- is primarily intended to serve as a feeder tion is to provide efficient, direct ser- to the GO Transit commuter railroad, vice to each customer, to group cus- although more recently it has been ex- tomers with similar origin-destination panded in the off-peak hours to a general pairs on the same vehicle, and to reduce area-wide service. The system in Regina, the cost of service to each passenger. Saskatchewan, described by Atkinson, Demand- responsive transportation primarily serves a feeder function to a systems complement conventional fixed- fixed-route bus line but also provides a route and scheduled systems. In low- more general area-wide service. Aex and medium-density areas, they can pro- discussed the operation of the area-wide vide a total transportation service where system in Batavia, New York, that also conventional, fixed-route buses are not replaced a fixed-route bus system. The economically feasible. In high-density Columbus, Ohio, system, described by areas, they can provide feeder service Habig, and the Buffalo, New York, sys- to line-haul facilities and thus fill the tem, described by White, are examples of existing void between conventional transit demand- responsive transportation in Model and taxi service. Cities areas. Oxley reported on several Many different types of demand- demand- responsive systems that are operat- responsive service are possible. These ing in or proposed for cities in England. include dial-a-bus, dial-a-ride, demand Two papers are included on the federally jitney, demand-actuated road transit, sponsored demonstration project in Had- computer-aided routing systems, genie, donfield, New Jersey, a community served telebus, call-a-ride and taxi-bus. by the Lindenwold Hi-Speed Line. Gwynn The l'Ecole Polytechnique, under con- and Simpson discuss the operation of the tract to the Transportation Development system, and Medville describes a user Agency of Canada, is preparing a 5- survey conducted by the technical monitors volume manual to aid those interested in of the project. the design and implementation of demand- Three papers on the Ann Arbor sys- responsive systems. A short report was tem include one by Lax, the city attorney, given at the conference on the progress of on the legal aspects of demand-responsive that project, and portions of the first vol- transportation, and his discussion will ume are included in this Special Report. undoubtedly be helpful to others who are All but two of the other papers presented involved in implementing similar sys- at the conference are also included. They tems. The other two papers contain re- can be grouped into two categories: those ports by Urbanik on the operation of the that deal with implementation of specific system and by Berla on the public's re- systems and those that deal with general sponse to the system. issues concerning many systems. Some The general papers include one by of the papers were formally written for Elliot on the relation of the transit Daniel Roos
workers' union to demand-responsive transportation, one by Guenther on the The Fourth Annual Conference on Demand- role of private industry, and one by Responsive Transportation Systems will be held Gustalson and Navin on the results of in September 1973. Those interested in attend- surveys of user preferences. ing or presenting a paper should write Daniel All of the implemented systems are Roos, Room 1-181, Massachusetts Institute of currently manually dispatched, and for Technology, Cambridge, Massachusetts 02139. that reason the two reports by Cherry and Davidson are particularly interesting. They describe compute r- dispatching sys- tems that have recently been implemented in their taxicab companies. Wilson and Higonnet further discuss the use of computer-dispatching of demand- responsive vehicles. The decision to publish the conference proceedings was made for several rea- sons. First, they contain the most cur- rent information on demand-responsive transportation systems. Second, the con- ference had an unusual cross section of participants and ideas representing many different organizations concerned with transportation. Third, the experiences gained by those who have implemented demand- responsive systems are valuable for the implementation of similar or new systems. The presentations were made by drivers, owners, and operators of vari- ous implemented systems. Their intent was not to present scholarly papers but rather to explain their systems from their perspectives. One of the principal objectives of the conference was to bring together people from many different ori- entations to focus on an area of common concern. Therefore, there is a wide variation in the approach used for each presentation. An attempt was made dur- ing editing not to destroy the original flavor that each author wanted to convey. DIAL-A-BUS: GUIDELINES FOR DESIGN AND IMPLEMENTATION
The dial-a-bus concept is no longer an This is part of a 5-volume manual that is being abstract idea. Since 1964, it has been produced to aid those interested in the design implemented in more than a dozen mu- and implementation of a dial-a-bus system. The nicipalities in North America and Europe. manual will contain information on all aspects of Though dial-a-bus is still in its experi- dial-a-bus from concept to operation and is being mental phase in Canada, Regina has not prepared by l'Ecole Polytechnique de Montreal been the only city to start such a system. under contract to the Transportation Develop- ment Agency of the Ministry of Transport, Bay Ridges, Ontario, has experimented Canada. This portion of the first volume is in- successfully with it, and this transit op- cluded in this report to provide background in- tion might well succeed in your commu- formation on demand-responsive transportation. nity.
DIAL-A-BUS IS DESIGNED TO In January 1971, W. G. Atkinson, FILL A GAP transit manager for Regina, Saskatche- wan, suggested to Harry Walker, Mayor Dial-a-bus is basically a hybrid be- of Regina, that some of the city's most tween a bus and a taxi system. It is de- pressing transportation problems could signed to fill a need not met by other be solved by a new mode of public transit available transportation modes. It com- that could substantially reduce the transit bines the door-to-door flexibility of pri- deficit. He pointed out that the new sys- vate automobile travel with the economy tem could improve transportation in of public transit, and it provides a areas of low population density, elimi- greater mobility to persons who would nate waiting outdoors for buses (Regina otherwise lack the opportunity to travel. winters often have subzero tempera- An additional advantage is that it can tures), pick up passengers at their door- be implemented as a primary system in steps, take them to their destinations small communities that do not yet have a quickly and comfortably, cost each pas- transit service. Or it can be grafted senger only 10 cents more than a regular onto existing systems either by replacing bus ticket, operate at low cost during some bus routes suffering from low pa- both peak and off-peak hours, cover most tronage or by adding more convenient of its operating expenses, require a rel- feeder access to other conventional lines. atively small capital outlay, and create Unlike less flexible transit modes, dial- more jobs than other transit alternatives. a-bus needs no fixed routes, and, be- By the end of 1971, after 4 months of cause small buses can be used, narrow experimental operation in southwest winding streets are not out of bounds. Regina, dial-a-bus surpassed many of the objectives originally established for it in the Regina telebus feasibility study. HERE'S HOW IT WORKS Passenger revenues are close to cover- ing operation costs. The system has When a person wants to go somewhere, carred a winter average of about 1,200 he phones the dial-a-bus number and passengers daily and as many as 2,200 on gives a dispatcher his address, destina- some bitterly cold days. The summer tion, and the time at which he wants to be average is lower, about 650, but that is picked up. The dispatcher passes the in- to be expected. formation on to one of the bus drivers Transportation Development Agency
assigned to the area. The driver pre- Figure 1. Dial-a-bus service patterns. pares his route from a list of customers' many-to-one many-to-few many-to-many addresses and picks up each passenger at or near his doorstep. :Iv For a guranteed pick-up time, a pas- 5' senger can phone for a dial-a-bus up to, 4 \ X say, 20 minutes before his planned de- parture time. The amount of advance S I notice needed depends on the length of the I "I route. The bus arrives at the passen.- ger's door within a few minutes of the time set by the dispatcher. When he possible origin-destination pairs - one possible dynamic bus routing steps on board, there is usually a seat waiting for him. Regular subscribers who use the sys- tem are assigned to the drivers in ad- plicity: It is convenient and easy to un- vance and are given priority over casual derstand. From the planner's viewpoint, users. the system's attraction is its flexibility: A passenger can phone for a dial-a- Nearly all the elements are adjustable. bus with less advance notice if he is will- The buses can be small, medium, or tug to take a chance that a bus is en route large—anything from an 11-seat modified near his home. Each bus is radio- van to a 42-seat bus. They can be mod- equipped, and a driver can handile occa- estly appointed or furnished with luxuries sional last-minute requests radioed to such as indoor-outdoor carpeting, air him by the dispatcher, if they do not dis- conditioning, and music. Not only can rupt the route. the routes be planned to satisfy demand, Dial-a-bus is adaptable to a wide trip by trip, but the level of service can range of routing and scheduling possibili- be easily adjusted without the customer's ties. For example, the Ontario commu- being affected or even being aware of the nity of Bay Ridges has set up what is change. Dial-a-bus can operate a fleet called a many-to-one (many origins, one of 2 vehicles or 200. The dispatching destination) service between commuters' system can be manual at first and com- homes and a commuter rail station. puterized later as fleets become larger. Regina provides an example of a many- If there is a computerized dispatching to-few service, which connects directly and monitoring system, the customer, to schools, nursing homes, shopping instead of requesting a bus from the dis- centers, and main bus routes. A many- patcher, can phone the dial-a-bus num- to-many (many origins, many destina- ber, dial a few additional digits, then tions) service is offered in Batavia, New hang up. The additional digits signal the York. These service patterns are shown size of his party, the time at which he in Figure 1. wishes to be picked up, the address of his destination, and a user identification code. The call is routed directly to the FLEXIBLE BUT SIMPLE central dispatching computer. The com- puter determines which bus is best able From the customer's point of view, to serve the customer and assigns it to the attraction of dial-a-bus is its sim- pick him up. Transportation Development Agency
ADDRESSES URBAN SOCIAL NEEDS Figure 2. Population distribution in urban areas.
So far we have been enumerating cer- 0 FRINGE AREA 0 D tain advantages particular to dial-a-bus 0 CITY PROPER 0 systems. Although dial-a-bus is flexible, 0 simple to use, and somewhat superior to 0 conventional bus service, these are not z the only attributes that justify its imple- 0 I- 4 mentation. The real case for dial-a-bus —J emerges as one examines the social and 0. 0 transportation problems that now face the 0. contemporary urban community, for it 56 61 66 56 61 66 56 61 66 56 61 66 56 61 66 addresses social needs in a manner that 6 conventional modes are hard pressed to 1.0 match. The following 4 sections are de- .0 4' o' voted to a more detailed discussion of this subject. Figure 3. Population distribution in urbanized areas. Boot i r' 0 FRINGE AREA 17 600 CITY PROPER The Low-Density Fact 4 uJ --
The number of people living in low- 400 0 density fringe areas is constantly rising (U (Fig. 2). While the size of the city N proper (high density) stays nearly con- 200 E stant, low-density development covers an cc increasing percentage of the metropolitan 0 area (Fig. 3). About 80 to 90 percent of 5661 66 56 61 56 56 61 66 56 61 66 56 61 66 .st te Montreal, Toronto, and Ottawa is low 0' density. ço' Transportation often appears to be an Figure 4. Employment distribution. afterthought in the planning and develop- ment of low-density areas. There are a 2.0 1. number of reasons for this. Costly I 0 FRINGE AREA i transit systems developed for use in i CITY PROPER I large cities cannot easily be adapted to o the growing needs and limited budgets of o II smaller towns. An additional problem is I I that even complex transit systems cannot 1.0 maintain the quality of service offered if (U II they operate in sprawling suburban areas >. II O Such overextended systems are charac- -J V/A terized by inflexibility, high costs, and 0. r,,A unsatisfactory service, all of which have o(U V//A i pci made public transit a poor alternative to the private car- 1964 1969 1981 Transportation Development Agency
The Transportation Challenge Social Objectives and New Markets
The emergence of low-density areas Dial-a-bus has shown it can trim has significantly altered the shape and transit deficits incurred by serving low- the structure of the cities. Of particular density areas. However, it should not be interest are the new travel patterns that viewed solely as a means for reducing have in many cases made existing sys- losses. It may be equally important to tems awkward and incomplete. achieve objectives such as service im- The largest single demand made of lo- provements in transit and mobility for cal transit still occurs in the daily mass the captive riders as we have shown shuttle between home and work. Yet above. Another feature of dial-a-bus of current trends point less and less toward considerable social importance is that it trips to and from the downtown core (Fig. is labor intensive—a desirable charac- 4). Urban travelers are now likely to teristic in an era of spiraling unemploy- travel from home to work and back with- m ent. out ever leaving the suburban fringe. Obviously a large city's transportation Now that urban populations are becoming system cannot be totally converted to dispersed over a greater area, the down- dial-a-bus. The latter is intended as a town region has ceased to be the only em- collection and distribution system for ployment center. Most administrative low-density and low-demand areas. Yet, offices remain downtown, but new fac- even within a large city, its flexibility tories and other commercial establish- allows it to reach passenger markets that ments are appearing in the fringe areas. traditional transit modes could never The result is a complex and diffused pat- serve. It is adaptable to sporadic and in- tern of trips to and from work. frequent demands such as late night The same helter-skelter effect is re- travel. A nighttime dial-a-bus service flected in traffic patterns during leisure in downtown areas could attract custom- hours, as people make more trips to new ers who hesitate to step outside the door shopping and recreational facilities in because of the rising crime rate and the low-density communities. These dif- prospect of waiting on a street corner for fused trips are increasing in number as the infrequent bus service. Dial-a-bus people have more leisure time. could also cater to special occasions and The work, shopping, and pleasure needs such as ferrying people home from trips discussed above may be regarded parties—a solution to New Year's Eve as the noncaptive transit market. A travel! group that presents an even greater challenge consists of people having no In Step With Urban Planning alternative to public transit. Included here are the young, the poor, and the New transportation systems generate aged. At the present time, people who commercial, industrial, and residential are concentrated in places such as development. When transportation ex- homes for the handicapped or retire- pansion lags behind fast-paced urban de- ment villages are frustrated in their velopment, the result is haphazard and travel desires. Trips to visit friends unplanned growth along its route. Con- are inconvenient and expensive, and, in sequently, private developers often seem many cases, the work trip is an im- by default to determine the city struc- possibility. ture. However, even if the city were Transportation Development Agency