Interstate Highway 391 starts near Chicopee center and goes into Holyoke. It has two lanes on both sides and is a typical interstate highway, but the speed limit posted is 55, not 65. The normal speed trap occurs on the south bound side after a bend in the road about 1 mile from the entrance in Holyoke. The road is patroled by state curisers. The crusier(s) normally park in the dirt area just after a guard rail so it is hard to spot them until it is too late. The curisers sometimes park on the north bound side near the same area. A slight bend in the road and a slight up hill grade hide the cruisers until it is too late.