An evaluation of stop signs used with flashing traffic signals. Final report.

Turner-Fairbank Highway Research Center, McLean, Va.

Feasibility of primary copper smelter weak sulfur dioxide stream control /

Mode of access: Internet.

Efficacy of red and yellow turn arrows in traffic signals. Final report.

Federal Highway Administration, Washington, D.C.

Traffic calming, auto-restricted zones and other traffic management techniques: their effects on bicycling and pedestrians. Case study #19.

Federal Highway Administration, Washington, D.C.

Guide to research in air pollution /

Mode of access: Internet.

Evaluation of flashing traffic signal operation. Final report.

Texas Department of Transportation, Austin

Air pollution measurements in Pittsburgh, January-February, 1963

Bibliography: leaves 49-50.

Interstate air pollution study; phase II project report.

Mode of access: Internet.

National emission standards study : report : appendix : a report to the Congress of the United States by the Secretary of Health, Education, and Welfare, in compliance with Public Law 90-148 : Clean Air Act, as amended.

Includes bibliographies.

Air quality data from the national air surveillance networks and contributing State and local networks.

1967 ed. issued by Division of Air Quality and Emission Data, as APTD 69-22.

Air sampling network:

Mode of access: Internet.

An Air monitoring survey design for toxic air pollutants : final report /

"ILENR/RE-AQ-89/05."

Annual air quality report.

Mode of access: Internet.

Clean air newsletter.

Description based on: September, 1991; title from caption.

Illinois annual air quality report.

Mode of access: Internet.