The informational load of highway guide signs. Final report.

Mode of access: Internet.

The legibility of highway guide signs with special reference to cardinal direction indications. Final report.

Mode of access: Internet.

Application of positive guidance at a freeway-to-freeway connector in California; an urban location in Dubuque, Iowa; and a two-lane rural site in Washington State. Final report.

Mode of access: Internet.

Effects of supplemental interchange signing on driver control behavior. Final report.

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

Application of positive guidance at a freeway split in Michigan. Final report.

Federal Highway Administration, Demonstration Projects Division, Washington, D.C.

Occupational marks and other physical signs; a guide to personal identification.

Mode of access: Internet.

User guide for removal of not needed traffic signals.

Federal Highway Administration, Washington, D.C.

Human factors requirements for real-time motorist information displays. Vol. 1 - design guide. Final report.

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

Sigma signs.

Description based on: 1983-1984.

Automata by al-Jazari, The face of a water clock with Zodiac signs, folio from the Kitab fi ma'arifat al-hiyal al-handisaya (the book of knowledge of ingenious mechanical devices) Automata by al-Jazari

1 ft. 13/32 in.x 8 5/8 in.; ink, opaque watercolor and gold on paper