by gg3 » Mon 31 Oct 2005, 06:33:36
WisJim is right on target about horse poop. When horses were used for primary urban transport, the manure, mixed with urine, was 18" deep in the streets. After that became intolerable due to endemic diseases, it took armies of street cleaners to keep up with the accumulation. Compared to all of that, automobiles were a blessing.
Horses rural, yes. Horses urban, no.
Hydrogen: no. Storage is a huge hassle, it seeps through any and all other known materials, faster or slower, but the loss is always present.
Where I think the future of transport is going:
More reliance on bicycles, enclosed three-wheel pedal powered vehicles, microcars using various 3-way-hybrid combinations of moped engines, electric, and pedal power, and larger plug-in hybrids for people with long distance transport needs. Electric power for short-haul trucks for urban work. Hybrid powertrains for trucks in certain applications. Shift from long distance trucking to rail for many freight applications but not all. Much greater reliance on public transport for passenger service, including light rail and electrified trolley bus lines. Mid-speed rail (approx. 100 mph) for many passenger applications in the range up to about 500 miles, possibly up to 1,000 miles. Microbuses to serve dispersed routes, much as airport shuttles do at present. Large shift to telecommuting for people whose jobs consist of handling information (e.g. people who work at desks using computers and telephones). Reduction in transport distances for many goods due to relocalization.
Here's a wild idea for you. If you live in the Bay Area you know about the Caldecott Tunnel: three bores through the mountains between 510 and 925 (sorry folks, I map geography by telephone area code, I'm a professional phone geek). Okay, here's the scenario: Keep two bores for conventional motor traffic, one-way per tunnel. Take the third bore, convert to accommodate two-way traffic consisting of bicycles and anything that qualifies as a moped, which would include your small electric three-wheelers and enclosed microcars with moped engines. Have your last couple of on-ramps in Berkeley/Oakland converted to divided traffic, with one lane switched to two-way traffic for bikes etc., and same case for your first two off-ramps on the other side, e.g. Orinda. This would allow the low-speed vehicles to get on and off from city streets at each end.
A similar case could be applied to the Bay Bridge except for the obvious safety hazard of cars whizzing by at high speed, even if there were concrete barriers to separate the alternative vehicles lane.
Prediction: whichever transport link (the tunnel or the bridge) is converted to enable use of pedal power and low-power vehicles, will produce economic benefits at both ends.
Here's another wild idea: Elevated bikeways. This was developed by an old friend & colleague, many years ago; he still thinks it's viable and so do I. In cities where roads are already congested, install the supporting columns along the center median strip, and provide onramps and offramps at suitable locations. Allow bikes, mopeds, enclosed versions of same, and the usual variations, to use these. Maximum speed 25 mph. If these bikeways were enclosed, they would be viable for conventional bikes even during major storm conditions.
Prediction: wherever these are built, housing near the on/off ramps will be in high demand.