Diamond Bar, California Speed Traps
On Grand going downhill toward Rolling Knoll Rd. (and Diamond Bar Blvd) Motorcycle cop sits on the "right sidewalk" at the intersection of Rolling Knoll Rd. with a radar gun pointed up the hill for cars traveling past the posted speed limit. Sometimes he is on the left side (on Rolling Knoll Rd.) by the time you see him, it’s too late.
On Grand going downhill toward Longview Dr. and into Chino Hills.
Motorcycle cops (sometimes 2) sit on the "right corner" past the intersection with radar guns pointed up the hill for cars traveling past the posted speed limit.
Motorcycle cops park in the dirt, under the tree, at the entrance to Sycamore Canyon Park. This is located across from the golf course, between Grand and Golden Prodos.
CHP at Phillips Ranch Rd onramp to 60 fwy west using radar – It’s down hill easy to pick up speed quickly approx a mile and a half before Diamond Bar Blvd.
A cop sits in the driveway to the parking lot with his lights off. Early morning and late at night. Watch out!