Monday, April 2, 2007

Human-powered transport

Human-powered transport is transport of person(s) and or goods motorized by human muscle.
Like animal-powered transport, human-powered transport has been in continuation since time immemorial in the form of walking, running and swimming. However modern technology has led to machines to improve human-power. Although motorization has compact the effort in transport, many human-powered machines stay popular for leisure or exercise and for short distance travel. Human-powered transport is frequently the only (reliable) power source available in underdeveloped or inaccessible regions, and may be measured an ideal form of sustainable transportation.

Tuesday, March 20, 2007

Barge

A barge is a flat-bottomed boat, built mostly for river and canal transport of important goods. Most barges are not self-propelled and need to be moved by tugboats towing or towboats pushing them. Barges on inland waterways (towed by draft animals on an adjacent towpath) contended with the railway in the early industrial revolution but were out competed in the carriage of high value items owing to the higher speed, falling costs, and route elasticity of rail transport.
Barges are still used today for low value bulk items, as the cost of hauling goods by barge is very low. Barges are also used for very weighty or bulky items; a typical barge events 195 feet by 35 feet (59.4 meters by 10.6 meters), and can take up to 1500 tons of cargo.