Here are some potential sources of evidence that your lawyer can use to prove legal responsibility for your work zone accident: Eyewitness testimony from people who saw the accident Photographic evidence of the scene of the accident Photographic evidence of what the work zone and the approaches to it looked like at the time of the accident Dashcam or traffic camera footage Testimony from an accident reconstruction expert You will have to meet your burden of proof in a highway work zone case. For each responsible party, you must prove your case by a preponderance of the evidence. You do not need to show who bears which proportion of the blame.