It was initially intended that the local trains were to terminate on the upper level, while the express trains using the lower level would continue on through lower Manhattan and then through the Montague Street Tunnel. However, plans were changed before construction ended. As a result, the lower level of the station is unused (except for non-rush hour storage of trains), as are the stub-end center express tracks at Canal Street on its upper level (the connections to which were instead "temporarily" rerouted to the Manhattan Bridge for service across that bridge). Another effect of this change is that the southern end of the upper level station slopes downward. This is a result of platform lengthening and rerouting the upper level downward toward the south, rather than letting the lower level stay at the same elevation and continue south through lower Manhattan. The lower level floor continues south of the station until it disappears under the increasingly low ceiling under the ramps carrying the upper level downgrade. The lower level was never used for passenger service or even finished with tiles and signage. Only the western platform was fully completed; the shorter eastern platform was never finished.