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Special Approvals

Similar in many aspects to a Department of Transportation Exemption (DOT-E), Special Approvals (SA) are granted or denied to parties seeking approval over a packaging or specific operational constraint. The fundamental difference lies in the manner of which the application is processed. For...

Comments on Molten Sulfur Rule Changes

This is in response to questions from the field requesting a clarification of the Hazardous Materials Regulations (HMR), concerning Docket HM-198 pertaining to molten sulfur.

Fiber Optic Train Tracking - Phase 1

The Federal Railroad Administration (FRA) sponsored a test conducted by Transportation Technology Center, Inc. (TTCI), in September 2017, to evaluate the capability of Fiber-Optic Acoustic Detection (FOAD) to track trains and identify track occupied in multiple track territories. Testing results...

Impact of Water on Cracked Concrete Crosstie Service Life

To investigate the impact of moisture on crack growth and other tie damage, UIUC researchers subjected pretensioned concrete crossties and small-scale beams to repeated loading conditions with water added to the system. Laboratory results revealed that cracked pretensioned concrete crossties...