00193361

Component

http://onlinepubs.trb.org...s/trr/1978/670/670-004.pdf

http://scholar.google.com...rman&publication_year=1978

The standard for photochemical oxidants is often exceeded during the summer in the Salt River Valley in the vicinity of Phoenix. Assessment of the photochemical oxidant problem in Phoenix is complicated by relatively low concentrations of nitrogen oxides in the morning, winds that switch direction in the middle of the day, and large changes in mixing height. In this paper, current measurements, modeling efforts, and control strategies are discussed as they apply to Phoenix. Although linear rollback or semiempirical correlations based on smog-chamber or actual measurements are now used to evaluate transportation strategies, better results could be obtained from mathematical air pollution simulation models. The linear rollback analysis currently used by local transportation planners shows that continued inspection and maintenance programs for automobiles and some vapor recovery programs will be required to reduce the maximum photochemical oxidant concentrations in Phoenix to levels below standard. The purpose of this paper is to review the current status of the photochemical oxidant problem in Phoenix and to make projections for the future. /Author/

Sponsored by Committee on Transportation and Air Quality Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411509

pp 20-25

1978

Transportation Research Record

Digital/other

Figures (8) ; References (13) ; Tables (1)

Inspection; Linear equations; Mathematical models; Motor vehicles; Nitric oxide; Nitrogen oxides; Photochemical oxidants; Standards; Transportation planning; Urban areas

Models

Phoenix (Arizona)

Highways; Vehicles and Equipment

TRIS, TRB

May 26 1979 12:00AM

• AIR QUALITY CONSIDERATIONS IN TRANSPORTATION PLANNING
• AN OVERVIEW OF THE GENERAL MOTORS SULFATE DISPERSION EXPERIMENT
• ATMOSPHERIC AND WIND TUNNEL STUDIES OF AIR POLLUTION DISPERSION NEAR HIGHWAYS
• DEVELOPMENT OF A METHOD TO RELATE 8-HOUR TRIP GENERATION TO EMISSIONS CHARACTERISTICS
• EXPERIENCE WITH CONSISTENCY REVIEWS IN FOUR METROPOLITAN AREAS
• INTEGRATED PLANNING AND MANAGEMENT OF TRANSPORTATION AND AIR QUALITY
• INTEGRATING AIR QUALITY CONSIDERATIONS AND THE TRANSPORTATION PLANNING PROCESS: EXPERIENCE IN THE WASHINGTON AREA
• MONITORING AND MODELING OF RESUSPENDED ROADWAY DUST NEAR URBAN ARTERIALS
• OVERVIEW OF THE NEW YORK STATE LONG ISLAND EXPRESSWAY DISPERSION EXPERIMENT
• OXIDANT MODEL APPLICATIONS: DENVER
• OXIDANT MODELING STATUS
• REGIONAL AIR QUALITY MODELING IN LOS ANGELES
• REVIEW OF U.S. ENVIRONMENTAL PROTECTION AGENCY GUIDELINES FOR EVALUATING INDIRECT SOURCES AND CARBON MONOXIDE HOT SPOTS
• ROLE OF THE FEDERAL HIGHWAY ADMINISTRATION UNDER THE CLEAN AIR ACT AMENDMENTS OF 1977