Railroad track deterioration is governed by the interaction between demand factors, such as accumulated traffic and axle loads, and capacity factors including track structure and maintenance practices. Tamping is one of the most widely used maintenance interventions for restoring track geometry, yet it is implemented using different strategies. Capital tamping—also referred to as production or […]
Category: Infrastructure
Integrating Long-Distance Drone Operations into Rail Inspections
Railroad inspections are a critical part of safe railway operations. Modern technologies offer great potential for complimentary methods for the traditional, mainly manual inspections. We are proposing to continue the evaluation of uncrewed aerial systems (UAS or drones) potential for long-distance (beyond visual line of sight) applications to provide rapid, flexible inspection of rail infrastructure. […]
Advancement of 3D Dynamic Finite Element Model Framework
Rail neutral temperature (RNT) management is critical for preventing rail buckles and rail breaks in continuously welded rail (CWR) track. Existing analytical and static numerical models used to evaluate rail break behavior and rail adjustment processes rely on simplifying assumptions, including uniform longitudinal resistance and quasi-static equilibrium. While these approaches have provided useful insight, they […]
UAV-Based Measurements with Optimization-Based Geometric Correction
Reliable measurement of small displacements in railway infrastructure is critical for improving condition monitoring and supporting data-driven maintenance decisions. However, traditional measurement techniques typically require track access, intrusive instrumentation, or localized sensing systems that limit spatial coverage and operational feasibility on high-traffic corridors. This project proposes the development and validation of a UAV-based measurement framework […]
Rail Anchor Slip Strength: Effect of Anchor Wear, Rail Wear, Load Rate, and Reaction Position
Rail anchors play a critical role in providing longitudinal track resistance and maintaining rail neutral temperature (RNT) in continuously welded rail (CWR) track. However, the slip behavior of drive-on rail anchors under realistic wear conditions and varying loading scenarios remains insufficiently quantified, limiting the ability to represent anchor performance accurately in mechanistic rail stress management […]
Modular Kirigami Truss for Temporary Railroad Bridge Systems
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 […]
Micromechanics of Fresh and Fouled Railway Ballast
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 […]
Strengthening the Railway Track Lateral Resistance by Reinforcing Ballast with Architected Instability-based Metamaterials (AIMs)
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 […]
Field Ballast Condition Evaluation Using Machine Vision and Artificial Intelligence
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 […]
Quantifying Lateral Track Capacity Using Nondestructive Nonlinear Vibration Response
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 […]