Minnesota has been tracking bicycle commutes for the past few years using Radio-Frequency Identification tags (RFID tags). The progam has been successful at making it quick and easy for bicycle commuters to log their trips on to campus and enter them in to raffles or gain wellness points.

More information here:

http://www.derozap.com/gopherzap/

and,

https://www.derozap.com/zaptwincities/

Interesting program to watch as it has a positive impact on the Minneapolis/St. Paul mode-share.