LouderVol
Extra and Terrestrial
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Bike lanes on roads essentially double the maintenance. We tell cities to expect to do at least 25% more maintenance if all they do is stripe lanes. If you have to widen the road, or add any type of barrier it increases real fast.Why do bicycles need to be taxed "heavily"? I'm not opposed to bicycles paying a share, say through registration etc. But the real wear and tear on roads/bike paths etc. is from the weight of the vehicle using the road/bike path. Hence, once bikeways are established, maintenance is minimal compared to roads with heavy trucks, etc.
Depending on the exact conditions adding bike lanes:
1a. Reduces driving surface so the car wear is more concentrated.
1b. Or adds more pavement surface, which has to be vehicle rated.
2. Creates more "intersections", this creates more joints for failure, and increases chances of collisions.
3. If you add physical separation/barriers, you reduce risk of collision but circles back to 1. More area needed. And more material/maintenance on the barrier itself.
4. Further increases imperviable surfaces in the area leading to more storm runoff and associated infrastructure (this is huge in cities).
5. Increases signage, lighting, bike racks. Even just 3 feet of bike lane (one lane bike traffic) adds at least 10% to lighting costs if you adjust the lighting to match the new sizes. All of that needs more maintenance.
6. Depending on the municipality you may have to introduce new road features, speed bumps/tables, separated vehicular turn lanes, stuff like that.
7. Depending on layout you are also likely displacing street parking, which has to end up somewhere.
8. Them you have all the other various street furniture that has to be adjusted, street trees, bus stops, dedicated pedestrian lanes.
You can offset a decent bit of the wear and tear if you also reduce the speed of the cars. 30 in the city is a good number. Small towns should be 25 max, 20 preffered.