Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Track maintenance"”.
-
Railroad decision support tools for track maintenance
… working order. Therefore, it is critical that maintenance is performed on the right components, at the right time, and in the right location. Application of decision support tools that use objective analysis methods can result in more efficient and effective maintenance plans. This requires …
-
A track maintenance model for high-speed rail : a systems dynamics approach
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
-
Establishing an analytical framework to evaluate track maintenance management policies at the MBTA
Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 1985.
-
Modelling track maintenance and its effects on the reliability of a single track railroad line
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
-
Scheduling of track inspection and maintenance activities in railroad networks
… spend billions of dollars every year on railroad track maintenance in order to ensure safety and operational efficiency of their railroad networks. Besides maintenance costs, other costs such as train accident costs, train and shipment delay costs and rolling stock maintenance costs are also …
-
Outsourcing transportation infrastructure maintenance : a theoretical approach with application to JR East
In transportation agencies, how to reduce maintenance and operation cost is one of the biggest and most common concerns, because their revenue is not expected to increase drastically in the future. One of the solutions undertaken nowadays is contracting out and utilizing contractors' efficiency for …
-
Reliability-based optimization of rail inspection
… Rail defect management is important for track maintenance, since rails are the most significant and basic component of the track systems. Rail inspection is a fundamental intervention to prevent rail failure. Railroads have evolved the rail inspection interval based on their empirical …
-
Low cost monitoring system to diagnose problematic rail bed : case study of Mud Pumping Site
… problems and requires frequent (bi-monthly) track maintenance. The field instrumentation program addresses some of the challenges faced with designing and installing the subgrade sensors: adoption of new low-cost sensor technologies, fabrication for harsh railway environment, ease of …
-
Design and testing of a railroad dispatching simulator using data-link technology
… current radio environment by itself. Safety of maintenance workers was equally greatly improved by both data-link systems. Train safety however, was improved only when using the data-link broadcast system. No increase in measured dispatching productivity (trains and track maintenance) was …
-
Flexural distress and degradation mechanisms in pretensioned concrete beams and railroad crossties
… are an essential component of ballasted railroad track and concrete is a commonly used material for crossties in demanding locations such as heavy axle load (HAL) freight railroads, high-speed rail lines, and rail transit systems. Concrete crossties are often designed as prestressed concrete …
-
Experimental and Numerical Study of Rubber Intermixed Ballast System Subjected to Monotonic and Cyclic Loading
… which is one of the most expensive items in track maintenance schemes. Given the current environmental issues, as well as the challenges in obtaining very large quantities of ballast, railway authorities have now looked for other alternatives. This doctoral study promotes the concept of using …
-
Class III / short line system inventory to determine 286,000 lb (129,844 kg) railcar operational status in Kansas and determination of ballast fouling using ground penetrating radar
… Class III / short line railroad operation and track maintenance costs. Class III railroads earn less than $38.1 million in in annual revenue and generally operate first and last leg shipping for their customers. In Kansas, Class III railroads operate approximately 40 percent of the roughly …
-
Development and application of the Illinois Buckle Risk Model (IBRM) using multi-source track condition data
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01