@Rob Beardsley
I don't read tea leaves and make simplistic giant-picture predictions. We're looking at a long and complex process here in unmapped territory. Some aspects of the process of the shift to an autonomous driving culture are obviously predictable. Some will happen before others. The only thing that is absolutely certain is that what most people and self-proclaimed experts think about the process is guaranteed to be completely wrong. The technology is inherently disruptive.
We are also not going to move the day or year after tomorrow to a system where traffic is all computer-controlled by a massive expert system constantly improving its performance and in which people are not allowed to drive their own cars, which are all purpose-built to maximize space and comfort for passengers and minimize space and comfort for autonomous drivers. If it even happens, that kind of massive shift would take a lot of time.
So what can we reasonably expect and predict?
Here's one idea that gets tossed around frequently: very quickly, well-paid big rig truckers will be put out of business except in specialized cases where there jobs cannot be taken by minimum wage workers with no special driving credentials driving smaller trucks. I think that's reasonably accurate.
The median pay for a commercial truck driver is $66,000, according to Google. Someone who makes minimum wage 40 hours a week for 52 weeks a year with a regular driver's license to supervise an autonomously-driven truck would make $15,080.
Again according to what Google just taught me, the max weight of a tractor-trailer is 80,000 lbs. 90% or more of tractor-trailers on the road max out at 75,000 lbs or less. According to PennDOT, a guy with a regular license can legally operate a vehicle of up to 26,000 lbs.
Assuming the law and its limits stay exactly the same and don't change to benefit the changing interests of very wealthy people and industries historically flush with cash while sticking it further to the weak, poor, and helpless (which of course never happens in America the Beautiful), that means that Pennsylvania cargo carriers will in the near future be able to pay an unskilled worker less than 1/4 of the going rate to take on reliably more than 1/3 of the typical truck load handled by a well-paid and experienced trucker.
So I am rather certain that one of the first things that is going to happen is that we're going to see more smaller trucks controlled by autonomous technology with minimally paid people behind the wheel just watching the technology do the work (perhaps while they do a second unskilled job on their tablets) on all roads moving more and more cargo, while there will be a decrease of larger load carriers with expensive drivers on roads that allow trucking traffic.
So if there's a road that goes over a bridge that typically has a lot of commercial tractor-trailers going over it in and out of a big shopping development primarily accessible by the bridge, I'd expect to see fewer large trucks on it and faster pickup on the smaller trucks going over it, which would increases the rate of traffic and would likely improve congestion along that artery, thus making rental properties on the less desirable side of this bridge more easily accessible by people who who don't want to pay out the nose for rental properties on the more desirable side of this bridge.