Comments on: B.R.T. (Bus Rapid Tunnel?) in China

By: fred_dot_u

fred_dot_u — Fri, 06 Aug 2010 15:28:55 +0000

Such a system would make cycling in the rain a more interesting experience, although the cyclist would have to stop where the transit stops, unless one could catch the next one ahead.

By: Brad Templeton

Brad Templeton — Fri, 06 Aug 2010 08:12:41 +0000

The difference from this and an elevated train is an elevated train needs elevated track. This can be expensive to build and permanently blocks the view, and is often opposed by neighbours for various reasons. Noise is also elevated and travels farther.

This plan calls for a fairly expensive “bus” on stilts over rail wheels. Presumably the special buses cost less than putting in an elevated line though that’s hard to say. However, they have less visual impact.

By: fred_dot_u

fred_dot_u — Wed, 04 Aug 2010 18:31:35 +0000

After viewing the image more intently, I see that it’s an intra-city transportation system without using up more real estate. As a cyclist, I’d enjoy very much to travel under one of those monsters, or to have one pass overhead on my commutes.

By: Biks

Biks — Wed, 04 Aug 2010 17:32:31 +0000

If you look at the video you can see that it’s more like a huge streetcar than a bus. Instead of building a separate track with a usual connected pair of rails they put the rails on both sides of two car lanes and put a huge rail car on it with its wheels on high stilts. You can also see that they are, of course, aware of all possible problems including emergency evacuation.

If you see the current bus lanes in the video filled with buses bumber to bumper that might be a feasible but nevertheless challenging solution to a growing mass transit problem on streets with no space for separate rail tracks.

BTW, another comparable solution for adding mass transit with less space was build more than a hundred years ago in Wuppertal, Germany. See http://en.wikipedia.org/wiki/Wuppertal_Schwebebahn .

By: Barry Childress

Barry Childress — Wed, 04 Aug 2010 16:37:42 +0000

I wounder how intersections or on/off ramps would be handled.

By: fred_dot_u

fred_dot_u — Tue, 03 Aug 2010 23:43:23 +0000

This sort of thing isn’t really new, though. I recall seeing cartoon cars extending wheels on a regular basis so the driver could get over traffic. Sometimes the wheels sprouted springs to bounce over other obstacles. When brought to the light of day, it still seems cartoonish.

By: Brad Templeton

Brad Templeton — Tue, 03 Aug 2010 19:39:38 +0000

Interesting idea for the robocar world, though, as such vehicles could accurately drive over one another. Of course, there is pretty low need for buses in such a world since small single person vehicles are more efficient and more flexible.

The big issue is stability. To be that tall you get less stable unless you are also very wide, defeating the point. Though one could consider a bus lane which is extra wide, like 12 feet wide, with a 10′ car lane down the middle, which human car drivers are able to manage. Or even a bus that is 20 feet wide with two cars lanes under it, which would be a very spacious and comfortable bus, though it would have higher drag.