These traces were collected in UMass DieselNet in the month October-November 2007. The released traces have five directories 1. gps_logs : This is the directory which has the cumulative gps_logs for all the buses seen during the period which the traces were collected. There is a directory corresponding to every bus and within each directory for a bus there are files for every day with a set of time stamped gps locations. 2. mobile-mobile: This is the collection of all the mobile-mobile contact events. Each line includes the time at which a contact occured, the amount of data that was transfered, the duration of contact and the position where the contact took place. 3. basestation-mobile: The traces are similar to the mobile-mobile traces but are for the AP-mobile contact events. 4. mobile-mobile-mesh-relay: these are the traces for the connection events between a mobile node and the six stationary relay/mesh boxes placed in the network. 5. xtendtrace: This has the connection events between mobile nodes over the Xtend Maxstream radio. Relays, Base Stations, and Meshes: Enhancing Mobile Networks with Infrastructure. Nilanjan Banerjee, Mark D. Corner, Don Towsley, and Brian Neil Levine. In Proceedings of ACM MobiCom, San Francisco, CA, USA, September 2008. Grant information : CNS-0519881,NSF-0133055,CNS-0615075,CNS-0520729,CNS- 0447877, W911NF-07-1-0281, W911NF-06-3-0001.