Coming over the Longfellow Bridge and into Cambridge, there is usually a cop standing beside his parked car about 50 – 75 yards past the end of the bridge, aiming radar at the bridge traffic. Since the Cambridge-bound side of the bridge has almost no traffic during this time of day, it is very possible to go very fast in this 30mph zone, so watch out. On multiple occasions, people have passed me on the bridge only to get pulled over as soon as they enter Cambridge.