Many people are unable or unwilling to ride bikes as alternatives to driving. Many people need to carry too much stuff, take elderly or very young people along, have no shower facilities at their destination or not physically strong enough to use a bike for the type of trip they need to make.
Getting improvements in PA shuttle, VTA, etc. are a big part of the solution which is never discussed. Getting kids to school, seniors to medical or other appointments, teens to after school activities, social activities, local jobs, can all be done if there were better public transportation.
It is about time all the traffic commentators in Palo Alto started pressing for better public transportation rather than pressing people to start riding bikes.