Category: Infrastructure

Storms and other extreme weather events are a major threat to the safety of railroad substructures and major railroad bridges. Flood or surge induced bridge collapses, such as the North Sioux City rail bridge collapse in June 2024, can cause long-term disruption to the railroad network and significant financial losses (Jones, 2024, KTIV news). From […]

The long-term performance of ballasted railway tracks is strongly influenced by the degradation of ballast, which compromises stability, drainage, and lateral resistance. Ballast, a coarse angular aggregate placed beneath and around sleepers, is designed to distribute loads, provide stability, and facilitate drainage. However, repeated train loading, tamping during maintenance, and environmental factors gradually break down […]

Preventing rail buckling is critical for maintaining railway safety, especially in high-temperature or fluctuating environmental conditions. Adequate lateral resistance is essential to avoid this issue, as thermal expansion in rails can lead to severe track misalignment and potential derailments. This project introduces a novel solution by employing temperature-responsive Architected Instability-based Metamaterials (AIMs) to reinforce ballast […]

Ballast plays an important role in supporting the railroad track structure against repeated loading. Ballast degradation causes poor drainage, lateral instability, and excessive settlement, and may lead to service interruptions and safety concerns. Therefore, utilizing efficient methods for evaluating ballast degradation ensures safe railroad operations. Traditional visual inspection is subjective and field sampling followed by […]

A research team from UIUC will develop and demonstrate the capability of a nondestructive testing system, comprising measurement hardware, software and an analysis approach, to quantify lateral mechanical track compliance in situ. The measurement approach is based on impulse-driven rail structure vibrations. The hypothesis that underlies the basis of the test approach is that the […]

The optimal design of grade crossings is a major challenge, as repairing grade crossings causes major delays to both rail and highway transportation systems. To improve the current state-of-the-art, this research project will focus on the development of a finite element model which can be used to simulate the interface between rail track and the […]

Railway corridors are often found in regions with modest grades and grade changes, such as riverbanks and coastal areas, making them prone to storm-induced interruptions and damages. Such incidents include inundation of track structure that causes operational restrictions, damages to rail tracks due to scour in the embankment or ballast, and damages incurred in rail […]

The railway industry faces challenges in the early detection of fatigue cracks’ profile (e.g., width and depth), which can compromise safety and lead to costly maintenance. Current ultrasonic inspection  methods, while widely used, struggle to identify cracks with the width of less than 0.5 mm due to their limited penetration and resolution capabilities. This limitation […]

Pre-tensioned concrete railroad ties provide an inherent corrosion resistance of the restressing steel since it is in direct with the high-pH concrete during casting. This high-pH environment causes a thin oxide layer to form on the prestressing steel which, in turn, serves to passivate the steel and prevent further corrosion. This passive layer will then […]