Passing and no-passing zones: signs, markings, and warrants. Final report.

Federal Highway Administration, Traffic Systems Division, Washington, D.C.

Astrology in medicine : the Fitzpatrick lectures delivered before the Royal College of Physicians on November 6 and 11, 1913 : with addendum on saints and signs /

Mode of access: Internet.

A preliminary laboratory investigation of passive railroad crossing signs. Final report.

Mode of access: Internet.

Safety features of stop signs at rail-highway grade crossings. Volume II. Technical report. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Experimental design for evaluating the safety benefits of railroad advance warning signs. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Executive summary and abstract for the report entitled "An evaluation of warning and regulatory signs for curves on rural roads."".

Federal Highway Administration, Office of Research, Washington, D.C.

Executive summary and abstract for the report entitled "An evaluation of signs for sight-restricted rural intersections."".

Federal Highway Administration, Office of Research, Washington, D.C.

Driver response in active advanced warning signs at high-speed signalized intersections. Final report.

Federal Highway Administration, Washington, D.C.

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

Turner-Fairbank Highway Research Center, McLean, Va.

Retroreflective requirements for traffic signs - a STOP case study. Final report.

Mode of access: Internet.

Minimal luminance requirement for official highway signs. Final report.

Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

An evaluation of warning and regulatory signs for curves on rural roads. Final report.

Federal Highway Administration, Office of Research and Development, Washington, D.C.

Service life of retroreflective traffic signs /

"October 1991."

Evaluation of speed control signs for small rural towns. Final report.

Federal Highway Administration, Washington, D.C.

Motorists' comprehension of regulatory, warning, and symbol signs. Volume I: executive summary. Final report.

Federal Highway Administration, Washington, D.C.