For one, they don't build DD trains to give more pax, crush loading is based on floor space and seating capacity. Remove the seats and you have more standing capacity and more capacity on the train. Dubai like many cities running train frequencies based on loading factor and the train technology is irrelevant.
While most govts tolerate bikes on their trains, one bike takes up the space of two pax and can add significantly two dwell times to get on and off crowded trains and platforms as well as significant safety issues, hence why restrictions are in place in many cities.
No comment on the standards to which the metro is being built.
Sydney has a number of lines all stations to the city (from outer suburban) with no express running due to traffic density. There will be more in the future as the population increases unless extra capacity is built. The use of using one pair of tracks to run both express and local is a hang up of the past. As in most cases the corridor width is full thus forcing more complex and costly issues such as tunnelling as is happening. The issue being that these corridors are not short, rather 10's of km long thus making these project multi billion dollar projects and adding even 0.5m extra width to the tunnel can add hundreds of millions of dollars to a project.
You say DD is expanding, I only see DD commuter networks expanding in a very limited number of locations and not being used for inner suburban expansion and upgrades. For every new DD carriage that is being built, there is probably at least one train set of SD fully Automated that is being built. China built how many new lines in last 20 years, how many are ?
No comment on the rest.
Edited 03 Dec 2017 07:21, 4 years ago, edited by Myrtone
For one, they don't build DD trains to give more pax, crush loading is based on floor space and seating capacity. Remove the seats and you have more standing capacity and more capacity on the train. Dubai like many cities running train frequencies based on loading factor and the train technology is irrelevant.
While most govts tolerate bikes on their trains, one bike takes up the space of two pax and can add significantly two dwell times to get on and off crowded trains and platforms as well as significant safety issues, hence why restrictions are in place in many cities.
No comment on the standards to which the metro is being built.
Sydney has a number of lines all stations to the city (from outer suburban) with no express running due to traffic density. There will be more in the future as the population increases unless extra capacity is built. The use of using one pair of tracks to run both express and local is a hang up of the past. As in most cases the corridor width is full thus forcing more complex and costly issues such as tunnelling as is happening. The issue being that these corridors are not short, rather 10's of km long thus making these project multi billion dollar projects and adding even 0.5m extra width to the tunnel can add hundreds of millions of dollars to a project.
You say DD is expanding, I only see DD commuter networks expanding in a very limited number of locations and not being used for inner suburban expansion and upgrades. For every new DD carriage that is being built, there is probably at least one train set of SD fully Automated that is being built. China built how many new lines in last 20 years, how many are ?
No comment on the rest.
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