Houston tunnel system

Access is allowed to the general public into these buildings with few restrictions, during normal operating hours, in order to reach the Tunnel.

The Tunnel has been criticized for its numerous stairways, especially in the northern portion, which make wheelchair use impractical in some locations.

Bob Eury director of the Houston Downtown District, stated that, "These areas haven't been made ADA-compliant because it would be difficult or impossible to put in ramps and still leave enough headroom for pedestrians.

Six blocks of the St. Joseph Medical Center are connected via skywalks at the southeast corner of downtown near the Pierce elevated.

After Tropical Storm Allison, some of the buildings installed floodgates to prevent another occurrence of tunnel flooding.

A tunnel in the west part of the downtown loop
One of several open-air sections of the tunnels