KEEPING WATCH: The surveillance cameras going up on the San Diego Freeway in Irvine will be watching for car-pool lane violations, but no one’s going to get a ticket, says Caltrans. It’s to test the experimental design of the car-pool lanes between Jeffrey Road and Irvine Center Drive. . . . Along that stretch, a “buffer lane” allows motorists to ease between the car-pool and regular lanes. It’s the only such design in the nation so far.