i find DIY bike lanes/routes to be useful in the early stages of advocacy pot string. i have installed a paint applying extra wheel to the back of my bike. With a gallon of yellow paint in a pannier and a plastic tube metering paint on to wheel and then the road a simple easy to follow stripe that cyclist can read but is not noticed buy drivers will allow you to help cyclist find quieter routes around town. i advocate not riding on the streets "we know the names of" opting instead for streets parallel to the arterial routes. Post small cyclist, size
appropriate, road signs explaining the route and destination of the paint stripes. Of course this DIY thing could result in miss understanding and political/legal feather ruffling if done too robustly, still it is an inexpensive approach to calming traffic and helping to answer that concern "I would like to ride a bike but the cars scare me".
This is a little off topic but still relevant. i think one might use it to persuade motorist.