Singapore has solved this extremely effectively. Note that the solution is not just on demand pricing but also having good transportation infrastructure that actually is usable and is a viable alternative.
Bay Area has addressed it to some degree but I would not call it solved by any means. They have dynamic pricing which ensure you can pay to go faster during peak times. This is mostly a solution for rich people who can afford the $15-20 tolls one way on 101 but in a pinch the common person may be able to use by paying money. However the US just has no decent public transportation infrastructure that can be relied on a daily basis to live your life normally due to legalized bribery (lobbying) by the by the car companies during the earlier years.