High Thruput requires Quick Hallicart removal at the endpoint...Here
a house using the more pricey scheme of cart storage.
Below are low cost solutions
in which carts are stored off-track. A conveyor moves arriving carts away
at once from the tube opening. This is not a necessary scenario, one can
also use the standard PRT technique of storing vehicles on rails, but this
requires more space. 
bravenet.com