Traffic light delay is too long

The delay in the traffic lights is too long. Traffic backs up into Witham. The delay is in the region of 10 minutes. The red light going towards Chelmsford is triggered by traffic passing the opposite light. It only allows a few cars through at a time. If the lights are there to restrict the weight on the weak bridge then they are doing a very poor job. They accumulate the traffic so that it is all on the bridge at one time. There is very seldom any traffic coming in the opposite direction as there is only one farm on the side of the A12. The whole problem would be resolved by having a button for the farm traffic to press when they need to proceed towards Witham. The lights could then be permanently on green for Chelmsford traffic, unless requested. The other problem is that the block of traffic passing over the bridge when the lights turn green then causes swerving and passing each other as they blend with the busy A12. Please do something... it's been years!!