Commenting in forums gives me some idea what it's like to have little children. You only use one vehicle at a time. I have paid for full use of the roads with taxes on my car(s). So I am entitled to use the roadway, whether it is in a car or on a bicycle.I don't use both at the same time. It is definitely to the convenience of motorists to remove cyclists from the roadway. Plus, this is only on state highways. Locally, we vote to tax ourselves to create bikeways, so the bikeways I ride on most of the time have been funded by taxes from a vote of the residents, MOST OF WHOM ARE MOTORISTS. In addition, on interstate highways, where wide shoulders are provided, these are funded largely through federal funds and contribute to the safety of motorists by allowing them to pull off the highway for emergencies.