For map matching of the GPS data to the network data, there is a algorithm from Schussler, N. & Axhausen, K. (2009a). Is this algorithm released under open-source license ? Where can I find this ?
"I know SF City implemented one of these algorithms to process gps tracks from a smart phone app they are using to track cyclists (cycletracks); and they released all of the code under an open-source license."- found in the below question.