Flutterby™! : Protected by a strip of paint

Bike lanes need physical protection from car traffic, study shows

And the roadscape appears to have an effect on how close drivers get to people on bikes. On average, cars left 10 inches (29 cm) less room when cyclists were using painted cycle lanes, 12 inches (30cm) less room when there were rows of parked cars along the curbs, and 15.7 inches (40cm) less room when a road had both parked cars along the curb, then a painted cycle lane. (In other words, cars left cyclists the most room on stretches of road with no painted cycle lanes and no parked cars.)

10.1016/j.aap.2019.03.007

‘Simple but Empowering’: Cyclists Place Red Cups Along Bike Lanes to Show How Vulnerable They Are