Mike, my heart goes out to you. I almost lost Diablo to a car accident.
He didn't come home one night, and I went to bed. On night later in the very
early am he dragged through his pet door. He climbed the stairs and
collapsed behind my computer desk. When I found him, his chest wasn't moving and he wasn't responding. I thought he was dead, from day one.
When I found him I rushed to the vet, and we managed to save him.
So, start calling vets near the Sonic or in that area. If he was hit and survived, then someone would take him to a vet! (remember the good souls out there like us!)
Check in drain pipes, under bushes and other hidey holes. Cats that are
lost or injuried like to "lay up" in holes...
I know its cold comfort but if the worst thing happened - animal control would pick him up and make case notes/record of it. Get down their pronto in person and check with them.
Also, check your local shelter PRONTO since if a neighbor or other brought him there they may only keep a few days before PTSing. I've heard horror stories about that.
Finally, ask around the businesses - near the Sonic - bring your cat pic with you, "have you seen this cat?"
In person is best if you can manage it. Post a reward - but be prepared
to screen out people who just want the reward...
Lastly, are there any cars/trucks he might have climbed into and
taken a ride in?
And does Clyde carry id? Chip, tag & collars?
Finally, prayers are with you for his safe recovery.
Most lost cats are found/lost with in 1 mile block of home - so
concentrate on close to home...
Sending prayers with all my...