I’ve actually heard of those before (never actually seen one) in either LA or SD where the police would set up a roadside smog check and randomly pull over cars that appeared to be “illegally modified”. Then they would pop your hood and do a smog check on your car to verify that everything was legit.
That was probably close to 5 years ago when SD had a major street racing scene. Now that the scene is dead I haven’t heard of that happening anymore. Would be interesting to know if they are starting to do that again.
Did the other cars in line appear to be modified or stock?
