I found something interesting.
In 2001, the Woodrow Wilson Bridge carried 200,000 vehicles per day
They then widened it from 6 lanes to 12
In 2019, traffic was just under 250,000.
So a 100% increase in capacity was followed by just a 25% increase in traffic.
That's a factoid that should be brought up every time some mouth breather claims widening the AL bridge won't reduce congestion.
While it physically supports 12 lanes, it's currently only striped for 10, so only a 66.6% increase. Still more than the increase in traffic, though!
Actually, that 25% increase in traffic slower than the 29% increase in population that the DC Area saw in that time frame. Induced demand my ass
It’s because nearly every single induced demand example comes from a cherry picked scenario especially those like the 405 through the Sepulveda pass where the issue isn’t one of simple lack of mainline capacity but also bottlenecks.
I’ve been skeptical of induced demand being a rational argument when I first heard about it ten years ago. I became interested in urban development and infrastructure as I signed up on OKCTalk a development forum for OKC. I was very shocked when I saw how many posters took shots at me and my idea of widening I-35 because it would simply become congested again therefore they shouldn’t widen it.
I-40 project near downtown was close to wrapping up as the mainline was being expanded to 5 GP lanes each way. Even with a bottleneck at I-44 it rarely gets congested outside of an accident almost 10 years later. No induced demand.
I still present my questions of exactly how traffic can be considered induced, or rather a specific number on how much traffic is induced demand and a distinction between it and latent demand. It’s a question I’ve yet to have answered when I first asked it 10 years ago. I’ve considered going to LATTC downtown for transportation planning on the side and I’ve always thought it’d be an interesting experience seeing how my ideologies would be tolerated by the undoubtably anti car stance the professors there have.