Funny thing about both Adam 12 and Emergency is that they were mostly filmed in the San Fernando Valley where the permits were cheaper, but still within the 30 mile zone (TMZ). The "1" in the call sign 1-Adam-12 was Rampart Division, downtown, so that wasn't, in reality, too far from the SFV. But Emergency's Squad 51 firehouse was actually in Wilmington near the LA Harbor. It was pretty funny watching the Squad or Fire Truck drive by the refineries then respond to Whiteman Airport WAY out in the valley.
Both shows show what real smog looked like. What people call smog in the LA basin today is just ocean haze caught in the basin. When I first moved to LA in '76, you could taste the air and there were days that schools were not allowed to let the kids out for recess. They keep tweaking the EPA "clean air" particulate numbers down to make it look like LA air is still dirty. It's not.
The big contrast between both shows and now it to see how big the trees have grown over the years. LA was pretty barren back then compared to now.
BTW, Route 66 is available on Hulu.
Pat