1993 Utility Trailer Steering problems

I was sitting at the light at new jersey and new york avenues (i was on new york avenue) at approximately 7:00 am. A dump truck was on new york avenue southbound and instead of waiting for the green light he made a right turn on red into oncoming traffic pulled into the left lane instead of staying in the right lane which in turn caused me to put on brakes and caused everyone behind me to slam on brakes which almost caused an accident. I blew my horn at the african american male driver and he proceeded to slam on brakes and then began driving slow in the left lane. The license plate number was 892 26 md, the usdot number was 426799.*Ak