I'm not sure I buy the concept of induced demand. If you widen a road and it results in more traffic, that sounds like there was already more demand than supply.
Induced demand should really be called "insurmountable demand." If there's a million more people who would take a traffic-clogged freeway if it were moving at 6mph, then it will always be clogged with traffic.
Every road I know, no matter how wide, is slow. And making it wider doesn't help because of induced demand.