There's a 3 lane (each way) street with traffic lights in my suburban city that I drive every day. I refuse to go above the speed limit (40mph) while driving in general but the generally accepted speed is 55mph and there's no enforcement.
Either they need to raise the limit or enforce it. I'm sick of being the asshole going too slow.
Also my speed is generally more a function of gas mileage than anything else. With stop lights littering the route I don't feel that driving 55 is any faster than 40. It just wastes more gas. So maybe it wouldn't even make sense to raise it and instead it just needs to be enforced.