2 ms·
> Tunnels have a smaller height difference than bridges. Only need clearance for the height of a cyclist, not for trucks or trains plus electric lines. Well, s
by michaelcampbell 4y ago
> Tunnels have a smaller height difference than bridges. Only need clearance for the height of a cyclist, not for trucks or trains plus electric lines.
Well, sure. Tunnels built FOR BICYCLES ONLY will have this advantage. A bridge build FOR BICYCLES ONLY would have similar small height requirements so this seems kind of moot.
Seems that the rest of the ideas are mostly based on the same one; smaller inclines/declines. The "work first, then coast" is not, of course.
- rakoo 4y agoNo, a bridge needs to go over the road that is used by trucks, even if the bridge is bicycles-only
- michaelcampbell 4y agoThat is a good point, but I was thinking of it in terms of 2 roads are going to cross and rather than make an intersection you have the choice of a bridge or a tunnel. On that road, the same trucks/bicycles/etc will use it regardless of your choice, so the tunnel can't be any less "height aware" than the bridge.
- fdupress 4y agoWait... A bridge built for bicycles only to go over still needs cars and lorries and other large things going under it. A bridge built for bicycles only to go under is nice, and means not even having to deal with a slope. (But might be more costly than a bicycle tunnel.)
- michaelcampbell 4y agoI was speaking to the requirements of the bridge's height requirements, not the ones of the road it goes over, but point taken.