Enforced mainly eastbound. The posted limit on route 30 until route 16 (Washington Street) is 35. After this light, the road climbs a long hill, and the limit drops to 30, though the road is just as wide with similar sightlines. The road dips after cresting the hill and goes around a shallow curve. The police sit just beyond the street at the bottom of this dip, which is Exeter street, and the car is pretty well obscured. They figure that after cresting the hill, one will keep ones foot on the gas and it is very easy to go 40 without realizing it at this point. THe cop pulls someone over, writes the ticket, and then goes around the block for another catch. The limit should be 35, since it is so on other portions of route 30 in Newton. This speedtrap is mainly enforced in the evening, but can be out at any time of day.