Transponders that might have helped pinpoint the location of a fire truck that collided with a landing Air Canada jet in New York will soon be installed on ground vehicles at the region’s three major airports. The Port Authority of New York and New Jersey, which operates the sites, said Tuesday that the trackers will be put on fire trucks and other rescue vehicles. The transponders can provide air traffic controllers with more precise information about the vehicles and their locations by constantly sending signals to the control tower. The National Transportation Safety Board noted the lack of transponders in a preliminary report it issued last week about the March 22 accident at LaGuardia Airport.