Variable Pricing

Use of the 495 Express Lanes, a HOT variable toll, has been fetching a pretty penny this year for commuters looking to escape the notoriously congested Capital Beltway. The ongoing experiment in commute pricing should recede before a tipping point.
Apr 16, 2014   The Washington Post
Los Angeles is planning to undertake a year-long experiment in demand-based pricing on parking in its downtown. The dynamic parking system will be put in place next summer.
Aug 24, 2010   Los Angeles Times
San Francisco has begun a two-year test of variably-priced parking meters in an effort to see how pricing affects driving and parking decisions in parts of the city.
Jul 31, 2010   San Francisco Chronicle
San Francisco's transportation agency has proposed the installation of parking meters in a handful of neighborhoods that dynamically change their prices according to the time of day and the related demand.
Jun 3, 2010   San Francisco Examiner