by eoforwic » Tue Jan 10, 2012 2:25 pm
It is on the LA freeway. Big signs. Some signs even give max and min speeds in which lanes. Or, "no traffic below 15 mph of mean traffic speed". This 15 MPH means, traffic can average 75, even though they are technically speeding, but some one can be doing 55 in right lane and still get a ticket.
In other cases, it is probably only enforced if a cop actually sees someone obstructing traffic. A citizen calling it in usually is ignored. If the "obstructor" isn't otherwise breaking the law, they aren't a big "target" for the cops.