Sideways

No, not the dog, may he continue to Rest In Peace, but about the traffic lights at Roberts and Chamblee-Dunwoody.

See? These are sideways rather than the traditional drop downs previously installed. Why the change?

Rumor has it that the city (that would be bureaucrats that run this show) were concerned that the drop downs were too low and might hit the top of trucks as they zoom thru this intersection. This is a reasonable concern because trucks routinely speed thru this intersection. Frequently.

You may already know, or can see from the picture, this is a no-truck-zone. You can infer that this means the city (that would be bureaucrats that run this show) has no intention of enforcing the truck restriction and is in fact catering to the needs of trucks violating the law. 

Isn't there a law against helping people violate the law?

They won't enforce that one either.