Gratiot btw 12 mile and frazho is a cruise spot at night. Roseville cops use this as a ticketfest. Anything from equipment violations(underbody neon) to noise infractions(stereos, exhaust, squeeling tires) to speeding and racing is enforced heavily. You can also get impedeing traffic if they notice you doing laps(going from 12 to frazho and back around again multiple times)