Ronald Lindsey. Positive train control in North America. IEEE Veh. Technol. Mag., 4(4):22-26, 2009. [doi]
@article{Lindsey09, title = {Positive train control in North America}, author = {Ronald Lindsey}, year = {2009}, doi = {10.1109/MVT.2009.934666}, url = {https://doi.org/10.1109/MVT.2009.934666}, researchr = {https://researchr.org/publication/Lindsey09}, cites = {0}, citedby = {0}, journal = {IEEE Veh. Technol. Mag.}, volume = {4}, number = {4}, pages = {22-26}, }