Grand Ave and Rolling Knoll Rd.
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.
Vote for this Speedtrap below:
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