http://articles.latimes.com/1986-12-...highway-patrol
It looks like there were as few as 15 total cars, I wonder how many were Mustangs.
Used on Interstate 5 San Joaquin Valley and I-5 and I-10 in Los Angeles and San Bernardino area beginning Jan 12,1987.
From Feb 1986:
http://articles.latimes.com/1986-02-...mmercial-truck
A bill now before the Legislature would allow the California Highway Patrol to use unmarked patrol cars for officers to detect safety violations by commercial truck rigs, an enforcement move unprecedented in the agency's 60-year history. At present, the CHP uses unmarked units in auto theft and some undercover investigations. But a bill introduced by Sen. John Seymour (R-Anaheim) would authorize the use of unmarked cars to nab heavy commercial truck speeders, weight violators and other commercial truckers who are not driving safely. Elmer Brown, the head of government relations for the California Trucking Assn., the trucking industry's statewide lobbying arm, said the industry supports the Seymour bill as a way of getting irresponsible, "'cowboy" truckers, who are dangerous to motorists, off the road.
Both articles from the LA Times.....