TCRP Report 65 ADDRESS CORRECTION REQUESTED Washington, D.C. 20418 2101 Constitution Avenue, N.W. National Research Council TRANSPORTATION RESEARCHBOARD TRANSIT COOPERATIVE RESEARCH TCRP PROGRAM REPORT 65 Sponsored by the Federal Transit Administration Evaluation of Bus Bulbs Evaluation of Bus Bulbs TRANSPORTATION RESEARCH BOARD NATIONAL RESEARCH COUNCIL TRB TCRP OVERSIGHT AND PROJECT TRANSPORTATION RESEARCH BOARD EXECUTIVE COMMITTEE 2001 SELECTION COMMITTEE OFFICERS CHAIR LINDA S. WATSON Chair: John M. Samuels, Senior VP-Operations Planning & Support, Norfolk Southern Corporation, Norfolk, VA Corpus Christi RTA Vice Chair: Thomas R. Warne, Executive Director, Utah DOT Executive Director: Robert E. Skinner, Jr., Transportation Research Board MEMBERS DANNY ALVAREZ MEMBERS Miami-Dade Transit Agency GORDON AOYAGI WILLIAM D. ANKNER, Director, Rhode Island DOT Montgomery County Government THOMAS F. BARRY, JR., Secretary of Transportation, Florida DOT JEAN PAUL BAILLY JACK E. BUFFINGTON, Associate Director and Research Professor, Mack-Blackwell National Rural Union Internationale des Transports Publics Transportation Study Center, University of Arkansas J. BARRY BARKER SARAH C. CAMPBELL, President, TransManagement, Inc., Washington, DC Transit Authority of River City E. DEAN CARLSON, Secretary of Transportation, Kansas DOT LEE BARNES JOANNE F. CASEY, President, Intermodal Association of North America Barwood, Inc. JAMES C. CODELL, III, Transportation Secretary, Transportation Cabinet, Frankfort, KY RONALD L. BARNES JOHN L. CRAIG, Director, Nebraska Department of Roads Central Ohio Transit Authority ROBERT A. FROSCH, Sr. Research Fellow, John F. Kennedy School of Government, Harvard GERALD L. BLAIR University Indiana County Transit Authority GORMAN GILBERT, Director, Oklahoma Transportation Center, Oklahoma State University ANDREW BONDS, JR. GENEVIEVE GIULIANO, Professor, School of Policy, Planning, and Development, USC, Los Angeles Parsons Transportation Group, Inc. LESTER A. HOEL, L. A. Lacy Distinguished Professor, Depart. of Civil Engineering, University of ROBERT I. BROWNSTEIN Virginia Booz-Allen & Hamilton, Inc. H. THOMAS KORNEGAY, Exec. Dir., Port of Houston Authority RONALD L. FREELAND BRADLEY L. MALLORY, Secretary of Transportation, Pennsylvania DOT Maryland MTA MICHAEL D. MEYER, Professor, School of Civil and Environmental Engineering, Georgia Institute of CONSTANCE GARBER Technology York County Community Action Corp. JEFFREY R. MORELAND, Exec. VP-Law and Chief of Staff, Burlington Northern Santa Fe Corp., SHARON GREENE Fort Worth, TX Sharon Greene & Associates SID MORRISON, Secretary of Transportation, Washington State DOT KATHERINE M. HUNTER-ZAWORSKI JOHN P. POORMAN, Staff Director, Capital District Transportation Committee, Albany, NY Oregon State University CATHERINE L. ROSS, Executive Director, Georgia Regional Transportation Agency ROBERT H. IRWIN WAYNE SHACKELFORD, Senior VP, Gresham Smith & Partners, Alpharetta, GA British Columbia Transit PAUL P. SKOUTELAS, CEO, Port Authority of Allegheny County, Pittsburgh, PA JOYCE HOBSON JOHNSON MICHAEL S. TOWNES, Exec. Dir., Transportation District Commission of Hampton Roads, North Carolina A&T State University Hampton, VA CELIA G. KUPERSMITH MARTIN WACHS, Director, Institute of Transportation Studies, University of California at Berkeley Golden Gate Bridge, Highway and JAMES A. WILDING, President and CEO, Metropolitan Washington Airports Authority Transportation District M. GORDON WOLMAN, Prof. of Geography and Environmental Engineering, Johns Hopkins University PAUL J. LARROUSSE National Transit Institute EX OFFICIO MEMBERS DAVID A. LEE Connecticut Transit MIKE ACOTT, President, National Asphalt Pavement Association EVA LERNER-LAM EDWARD A. BRIGHAM, Acting Deputy Admin., Research and Special Programs Administration, U.S.DOT The Palisades Consulting Group, Inc. BRUCE J. CARLTON, Acting Administrator, Maritime Administration, U.S.DOT ROBERT H. PRINCE, JR. JULIE CIRILLO, Acting Administrator, Federal Motor Carrier Safety Administration, U.S.DOT Massachusetts Bay Transportation Authority MORTIMER L. DOWNEY, Deputy Secretary of Transportation, U.S.DOT RICHARD J. SIMONETTA ROBERT B. FLOWERS (Lt. Gen., U.S. Army), Chief of Engineers and Commander, U.S. Army Corps of Prima Facie, Inc. Engineers PAUL P. SKOUTELAS JANE F. GARVEY, Federal Aviation Administrator, U.S.DOT Port Authority of Allegheny County EDWARD R. HAMBERGER, President and CEO, Association of American Railroads PAUL A. TOLIVER JOHN C. HORSLEY, Exec. Dir., American Association of State Highway and Transportation Officials King County Metro ANTHONY R. KANE, Exec. Dir., Federal Highway Administration, U.S.DOT HIRAM J. WALKER S. MARK LINDSEY, Acting Deputy Administrator, Federal Railroad Administration, U.S.DOT FTA JAMES M. LOY (Adm., U.S. Coast Guard), Commandant, U.S. Coast Guard AMY YORK WILLIAM W. MILLAR, President, American Public Transportation Association Amalgamated Transit Union MARGO OGE, Director, Office of Transportation and Air Quality, U.S. EPA EX OFFICIO MEMBERS VALENTIN J. RIVA, President and CEO, American Concrete Pavement Association WILLIAM W. MILLAR ASHISH K. SEN, Director, Bureau of Transportation Statistics, U.S.DOT APTA L. ROBERT SHELTON, Exec. Dir., National Highway Traffic Safety Administration, U.S.DOT ANTHONY R. KANE HIRAM J. WALKER, Acting Deputy Administrator, Federal Transit Administration, U.S.DOT FHWA JOHN C. HORSLEY TRANSIT COOPERATIVE RESEARCH PROGRAM AASHTO ROBERT E. SKINNER, JR. Transportation Research Board Executive Committee Subcommittee for TCRP TRB JOHN M. SAMUELS, Norfolk Southern Corporation, Norfolk, VA (Chair) LESTER A. HOEL, University of Virginia TDC EXECUTIVE DIRECTOR WILLIAM W. MILLAR, American Public Transportation Association LOUIS F. SANDERS ROBERT E. SKINNER, JR., Transportation Research Board APTA PAUL P. SKOUTELAS, Port Authority of Allegheny County, Pittsburgh, PA MICHAEL S. TOWNES, Transportation District Commission of Hampton Roads, Hampton, VA SECRETARY MARTIN WACHS, Institute of Transportation Studies, University of California at Berkeley ROBERT J. REILLY HIRAM J. WALKER, Federal Transit Administration, U.S.DOT TRB THOMAS R. WARNE, Utah DOT TRANSIT COOPERATIVE RESEARCH PROGRAM TCRP REPORT 65 Evaluation of Bus Bulbs KAY FITZPATRICK KEVIN M. HALL STEPHEN FARNSWORTH MELISA D. FINLEY Texas Transportation Institute College Station, TX SUBJECT AREAS Public Transit Research Sponsored by the Federal Transit Administration in Cooperation with the Transit Development Corporation TRANSPORTATION RESEARCH BOARD — NATIONAL RESEARCH COUNCIL NATIONAL ACADEMY PRESS WASHINGTON, D.C. — 2001 TRANSIT COOPERATIVE RESEARCH PROGRAM TCRP REPORT 65 The nation’s growth and the need to meet mobility, Project A-10A FY’98 environmental, and energy objectives place demands on public ISSN 1073-4872 transit systems. Current systems, some of which are old and in need ISBN 0-309-06665-4 of upgrading, must expand service area, increase service frequency, Library of Congress Control Number 00-136357 and improve efficiency to serve these demands. Research is necessary to solve operating problems, to adapt appropriate new © 2001 Transportation Research Board technologies from other industries, and to introduce innovations into Price $29.00 the transit industry. The Transit Cooperative Research Program (TCRP) serves as one of the principal means by which the transit industry can develop innovative near-term solutions to meet demands placed on it. The need for TCRP was originally identified in TRB Special Report 213—Research for Public Transit: New Directions, published in 1987 and based on a study sponsored by the Urban Mass Transportation Administration—now the Federal Transit Admin- istration (FTA). A report by the American Public Transportation NOTICE Association (APTA), Transportation 2000, also recognized the need The project that is the subject of this report was a part of the Transit Cooperative for local, problem-solving research. TCRP, modeled after the Research Program conducted by the Transportation Research Board with the longstanding and successful National Cooperative Highway approval of the Governing Board of the National Research Council. Such Research Program, undertakes research and other technical activities approval reflects the Governing Board’s judgment that the project concerned is in response to the needs of transit service providers. The scope of appropriate with respect to both the purposes and resources of the National TCRP includes a variety of transit research fields including plan- Research Council. ning, service configuration, equipment, facilities, operations, human The members of the technical advisory panel selected to monitor this project and resources, maintenance, policy, and administrative practices. to review this report were chosen for recognized scholarly competence and with TCRP was established under FTA sponsorship in July 1992. due consideration for the balance of disciplines appropriate to the project. The Proposed by the U.S. Department of Transportation, TCRP was opinions and conclusions expressed or implied are those of the research agency authorized as part of the Intermodal Surface Transportation that performed the research, and while they have been accepted as appropriate Efficiency Act of 1991 (ISTEA). On May 13, 1992, a memorandum by the technical panel, they are not necessarily those of the Transportation agreement outlining TCRP operating procedures was executed by Research Board, the National Research Council, the Transit Development the three