Because so many motorists are exceeding the 55-mph speed limit on Tucson's
interstates, the Arizona Department of Transportation has proposed raising
the limit to 65 mph on most of the areas freeways. The agency wants to better
reflect actual driving speeds on freeways, where studies show that most motorists
exceed the limit by 10-15 mph.
The speed limit along Interstate 10, a major truck route, would increase
from Ina Road to Prince Road and from Kino Parkway to Craycroft Road, the
Arizona Daily Star reported. About 40 percent of vehicles traveling along
the freeway are commercial vehicles. ADOT did not say where the speed limit
would rise on Interstate 19.
A final decision on increasing the speed limit on I-10 and I-19 could come
within the next month - three years after traffic engineers began working
on the idea. The state Department of Public Safety opposes the increase, saying
faster vehicles means less time to react in emergencies.