Topic summary
MUTCD
Extracted from the Wikipedia article Manual on Uniform Traffic Control Devices.
Mid-20th century
The 1971 MUTCD's preference for a rapid transition to symbols over words were removed in the 1978 MUTCD. After 1971, FHWA formally assumed responsibility for publishing the MUTCD. The 1971 MUTCD was revised eight times. In 1978, the MUTCD physical format was changed to a ring binder whose revisions were published as replacement pages (i.e., an interfiled looseleaf service). The 1978 MUTCD was subject to four revisions, and the subsequent 1988 MUTCD was subject to seven revisions.