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An investigation occurred by Sharma & Associates, Inc. (SA) of the feasibility of temporarily shedding electrical demand associated with passenger car heating ventilation and air conditioning (HVAC) systems during periods of peak traction demand, with the goal of right-sizing the main engine...
This report discusses the feasibility of temporarily shedding electrical demand associated with heating and ventilation air conditioning (HVAC) systems of passenger cars during periods of peak traction, with the goal of right-sizing the main engine on a passenger locomotive. Industrial...
This report describes the investigation and implementation of changes performed by Transportation Technology Center, Inc. (TTCI) to improve the efficiency and capabilities of the current Positive Train Control (PTC) braking algorithm evaluation methodology for freight operations. Improvements...
From June 12, 2013, to July 31, 2017, the Federal Railroad Administration funded the development of the Train Energy and Dynamics Simulator (TEDS) software by Sharma & Associates, Inc. (SA) to study train operation safety and performance as affected by equipment, train...
This research develops a cyber security risk analysis methodology for communications-based connected railroad technologies. The methodology can be tailored to specific use cases and system designs. By implementing the methodological framework, the study can identify potential cyber attack...
The Train Energy and Dynamics Simulator (TEDS) is simulation software, funded by the Federal Railroad Administration (FRA) and developed by Sharma & Associates, Inc. (SA), to study train operation safety and performance as affected by equipment, train makeup, train handling, track conditions...
This study describes in general terms the present status of grade crossing inventories, improvement programs and other significant considerations. It identifies available information with respect to the cost of accidents and motor vehicle operations, as well as the preparation of estimates of...
The constraints on innovative grade crossing protective systems are delineated and guidelines for development indicated. Inventory data has been arranged to permit an estimate of the classes of systems needed, the allowable costs, and contribution of various types of crossings to accidents. Many...
A field demonstration study in support of the evaluation of alternative railway-highway grade crossing accident countermeasures was conducted. Guidelines were provided for the development of countermeasure concepts, the selection of candidate countermeasures, countermeasures evaluation methods,...