Detectable warnings: detectability by individuals with visual impairments, and safety and negotiability on slopes for persons with physical impairments. Final report.

Federal Transit Administration, Washington, D.C.

Detectable warning surfaces: color, contrast, and reflectance.

Federal Transit Administration, Washington, D.C.

Information content at night of roof-mounted emergency vehicle lights. Final report.

Transportation Department, Office of University Research, Washington, D.C.

Glare and driver vision report.

National Highway Safety Bureau, Washington, D.C.

Tactile warnings to promote safety in the vicinity of transit platform edges. Final report.

Urban Mass Transportation Administration, Washington, D.C.

The utility of peripheral vision to motor vehicle drivers. Final technical report.

National Highway Traffic Safety Administration, Washington, D.C.

Effectiveness of audible warning devices on emergency vehicles. Final report.

Transportation Department, Office of Noise Abatement, Washington, D.C.