Railway Digital Base Maps, Location Reference Systems and Interoperability of Positive Train Control Systems Dick, C.T. and C.P.L. Barkan. 2000. Railway Digital Base Maps, Location Reference Systems and Interoperability of Positive Train Control Systems. In: Proceedings of Transportation Research Board 79th Annual Conference. Washington, DC. Files Railway Digital Base Maps, Location Reference Systems and Interoperability of Positive Train Control Systems - Full Text (PDF) Categories Systems
