Cambie Corridor Updates

[jollyburger]

Originally Posted by officedweller

I seem to recall that some of the platforms on the Canada Line were built with a 0.5% grade to lessen the steepness of the grade between stations.
That's probably the tolerance.
You don' want passengers in wheelchairs or baby strollers rolling off the platform onto the tracks.

Someone said the short platforms helped with the gradients between stations?

Regarding longer platforms, that change would have had serious cost implications for the construction and design of the system.

The short platforms allow reasonable operating gradients between stations on the hill on Cambie St. between False Creek and Queen Elizabeth Park, which is quite steep. The stations are also very close to the surface (due to cut and cover construction). If longer platforms were to be built, the uphill stations from False Creek (Broadway City Hall and King Edward) would have had to be deeper to maintain a reasonable gradient between stations. (i.e. shortening the distance between stations means a steeper gradient between stations if the same difference in elevation is maintained – so to reduce the gradient over the same distance, you must reduce the gain in elevation => deeper uphill station)). That would mean that Broadway City Hall and King Edward Station and the tunnel around them could not have been cut from the surface but would have had to have been bored tunnel. A deep bore tunnel would have also eliminated the possibility of a future station at 33rd Ave. due to its depth.

https://www.thetransportpolitic.com/2009...vancouvers-new-canada-line-is-suffering/