Mohd Rapik Saat

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Analysis of the causes of train accidents is critical for rational allocation of resources to reduce accident occurrence in the most cost-effective manner possible. Train derailment data from the FRA rail equipment accident database for the interval 2001 to 2010 were analyzed for each track type, with accounting for frequency of occurrence by cause and(More)
The performance metric for tank cars and other hazardous materials vehicles involved in accidents has generally been conditional probability of release given involvement in an accident. This metric considers the probability of a release event occurring but does not take into account the quantity of product lost in a release incident. In this paper, a new(More)
Keywords: Highway-rail grade crossings High-speed rail Freight rail United States shared corridors a b s t r a c t This study presents an overview of the challenges of grade crossings to shared high-speed rail (HSR) passenger and heavy-axle-load (HAL) freight operations in the U.S., as well as an in-depth analysis of the relevant research to date, through(More)
North America railways offer safe and generally the most economical means of long distance transport of hazardous materials. Nevertheless, in the event of a train accident releases of these materials can pose substantial risk to human health, property or the environment. The majority of railway shipments of hazardous materials are in tank cars. Improving(More)
Rail transportation plays a critical role to safely and efficiently transport hazardous materials. A number of strategies have been implemented or are being developed to reduce the risk of hazardous materials release from train accidents. Each of these risk reduction strategies has its safety benefit and corresponding implementation cost. However, the cost(More)
Upgrading track quality offers potential safety and service quality benefits because it can reduce both derailment rate and transportation time. However track upgrades are costly and increase capital and operating expense for upgrade and maintenance. A preliminary model was developed to estimate the various safety and performance benefits, the extra costs,(More)
ment of the risk posed by these materials requires an understanding of how different approaches may reduce risk and their relative cost-effectiveness both alone and in combination. There are various approaches to hazardous materials transportation risk reduction. A variety of operations research techniques have been developed and applied to consider each(More)
Derailments are the most common type of freight-train accidents in the United States. Derailments cause damage to infrastructure and rolling stock, disrupt services, and may cause casualties and harm the environment. Accordingly, derailment analysis and prevention has long been a high priority in the rail industry and government. Despite the low probability(More)
1 Increasing rail hazardous material traffic including petroleum crude oil in North America, and 2 several recent severe release incidents highlight the need to further improve railroad 3 transportation safety. Accurate estimation of the consequence of a release incident is a key 4 element in risk management. This study develops a new methodology for(More)