Many public transit systems actively prohibit bringing on bicycles. Called intermodal transportation it involves using two or more forms of transportation in a journey. This innovative solution from Stuttgart, Germany adds desperately needed bicycle accommodation on this light rail / tram line.
Bicycles can often increase the use of public transit. However, limited storage space onboard hinders the promotion of intermodal commutes. Imagine if our trains and trams were all designed to accomodate bicycles. What a difference it would make.
You could also transport wheelchairs more easily.
Image via This Big City from http://bit.ly/16ORlmr
Read about We Are Traffic, and their video about Complete Streets, making streets available for pedestrians, cyclists, motorists and public transit: www.wearetraffic.org