SPEED TRAP: WHO GETS A TICKET, WHO GETS A BREAK How fast you can go

It depends who is writing the ticket. In Boston, for example, police don't generally crack down on speeders—ticketing 80 percent of those stopped—until a driver is going more than 20 miles over the speed limit. State Police ticket 80 percent of speeders when a driver is going more than 10 miles over the limit.

CHANCES OF GETTING A TICKET

SOURCE: Boston Globe analysis of records from the Mass. Registry of Motor Vehicles, April and May 2001