by rail10
what technology makes the high speed train goes very fast unlike conventional trains?
Railroad Forums
Moderators: mtuandrew, gprimr1
Nasadowsk wrote: * Electric traction. Almost a requisite, or you get killed on power costs and suffer bigtime on acceleration. Expect 12.5k or 25k at the wire although 15kv 16.3 hz and even 3,000 volt DC has been used on the TGV.15kV, 16,75 Hz is the standard on german high-speed-lines (HSL) as on all electrified mainlines in Austria, Switzerland, Sveden and Norway.
modorney wrote:Grade crossings can be a challenge. One method is to have four gates, that totally block all four sides, so drivers won't drive around. This also requires a certain amount of stationary barriers, so drivers won't drive on shoulders, sidewalks, etc. Also, this requires cooperation from local police as far as ticketing, etc., to avoid a culture of sloppy enforcement.No. Because grade crossings must be close early enough to give a signal to the train before he comes nearer than the distance he needs to stop.
Crossings have to be flat, so that long trucks won't high-center and get stuck.
In remote areas, crossings need to be offset, such that a drowsy driver won't cruise on thru, but has to curve slightly to keep on the road. Of course, you don't want the drowsy driver to hit a brick wall, there needs to be room for a sand pit.
In cities, alternate streets can be one-way streets, to achieve a four-way effect.
Private, ungated crossings are pretty much unsuitable. In some areas, a few private crossings can be combined, with collecter roads on each side. In other cases, low-cost Bailey Bridge overheads can be implemented. Or, a low clearance (8 foot) undercrossing is possible. With a locked gate for bigger trucks.
modorney wrote:Grade crossings can be a challenge. One method is to have four gates, that totally block all four sides, so drivers won't drive around.On genuine High Speed Lines there can be no crossings at all, anywhere. If you are building a new line there is no problem about building bridges wherever a road needs to cross the track. There can be no farm crossings at all.