I sent to Rudolf and Sletten's (general contractor for a UC Berkeley project) contact email: email@example.com the following message:
Subject: Traffic to and from construction site between Oxford St. and Shattuck Ave. Berkeley
I walk almost every day in Berkeley. The large trucks servicing your UC Berkeley construction site between Oxford St. and Shattuck Ave. Berkeley drive in a most reckless and pedestrian-endangering way.
For example, they speed down Shattuck Ave. towards the site and at the Hearst intersection they take a right hand turn, playing "chicken" with pedestrians in the marked cross walk legally crossing Hearst with the light. Sooner or later someone is going to blink and there is going to be a serious accident.
These trucks you run or have hired are being operated in a dangerous manner. You need to get on this situation immediately before someone winds up seriously injured.