I'm sorry that you were hit and I hope you can find the person.
It doesn't immediately look familiar to me, but then again I haven't been in the industry very long all things considered.
From what I can tell I don't think it's a major carrier. It has a grille guard, and chrome spike lug nuts - not things major carriers would typically equip on their trucks. My guess would be an owner operator , or smaller outfit.
In the hopes of helping identify it here are some other observations.
Dark colored (blue?) truck. The logo is on the side door, and consists of a white rectangle with a blue "T" on the left and two lines of lettering to the right, with the upper lettering being blue and the lower lettering appearing red to my eyes. Below the logo is white lettering, which may be DOT identification. I don't see any other identifiable information such as a truck number.
An owner-operator is a driver who either owns or leases the truck they are driving. A self-employed driver.
A department of the federal executive branch responsible for the national highways and for railroad and airline safety. It also manages Amtrak, the national railroad system, and the Coast Guard.
State and Federal DOT Officers are responsible for commercial vehicle enforcement. "The truck police" you could call them.
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I was involved in a hit-and-run. I have dash-cam footage of the accident, but it's blurry. Police have given up since no one was physically hurt.
I think my only chance is for someone to see the video and recognize the logo on the blue truck.
https://share.icloud.com/photos/04eeWzClVyN3oySPwsGHmZgZw
It should be possible to download the video. The web view is a lot worse; I think. Regardless, the writing is not entirely discernable.
(PS: I've posted this on reddit (r/dashcam), but messed up the title of the post, so people might think it's a post for post sake.)