When leaving the number 7 from Dartmouth to go to Bedford on Dartmouth RD. The speed is reduced to 50 k . and you are more than likely doing 65 to 70 k from using the number 7. You are also going down hill and the officer will park crusier on Brentwood out of sight . Then stand so as not to be visible until you are on top of him. When there, they are very aggresive at giving out tickets by stopping cars one after the other. This is a speed trap of the worst kind.