Widespread implementation of Positive Train Control (PTC) has initiated this trend. In PTC-controlled territory, where PTC automates signal speed, enforcement of track speed, and safe train separation, the wayside signal system is beginning to move the wayside signals into the cab of the locomotive, along with other relevant data that assists the locomotive engineer in…

The $499-billion legislation contains nearly $370 billion in carbon reduction, resiliency, and clean energy incentives. Once fully adopted, analysts forecast the combination of grants and tax credits will cut U.S. carbon emissions 40 percent by 2030. Notable changes to the federal tax code include: Larger tax credits for renewable energy, clean transportation, and energy efficiency…

At the same time, APM resiliency is becoming increasingly complex. As airports and cities undertake widespread electrification initiatives, greater burden is placed on already strained grid resources. Source: Journal of Mechanical and Civil Engineering To guarantee uninterrupted service in the event of equipment failure or a complete power outage, APM systems require special focus on…

CBTC unleashes the intelligence of automatic train control systems, utilizing: High-resolution location-determining telemetry (hardware and software),Bidirectional train-to-wayside data communications, andA combination of train-borne and wayside processors. Together, these systems are capable of implementing automatic train protection (ATP) as well as optional automatic train operation (ATO) and automatic train supervision (ATS). Multiple benefits arise from the ability to constantly evaluate a train’s real-time…

As fleet operators consider a hydrogen-powered future, infrastructure considerations include the fueling capacity necessary as more FCEVs are added to the fleet, the impact of refueling stations on operational costs and maintenance procedures, and the overall environmental goals of the fleet-electrification transition. Photo courtesy of National Renewable Energy Laboratory Falling Technology Costs, Greater Hydrogen Supplies…

In response, transit agencies are looking to abandon reactionary measures of the past. Rather than attempt to halt water infiltration, pump out accumulated water, and repair the damage, agencies can extend the lifespan of subway systems and related underground infrastructure through custom programs that pilot new technologies and train maintenance staff on emerging best practices.…

Seeing the Big Picture Large-scale capital projects come with inherent uncertainties — from underground utility conflicts to land acquisition disputes to the impacts of extreme weather. Despite these risks, conventional assessments often lack sufficient rigor or do not include key stakeholders when assessing risk factors. Even more troublesome, risk assessments frequently get skipped altogether. By…

Rising to the challenge, a market for fleet-charging services is taking shape. Fleet electrification creates opportunities for service providers who can efficiently and cost effectively install, operate, monitor and maintain charging equipment and related infrastructure. Greater understanding of these newly emerging business and financing models will ultimately lead to a faster, more widespread and cost-effective…

After comparing plug-in hybrid, battery electric and hydrogen fuel cell options, the takeaway is clear. Although the total cost of battery-electric buses (BEBs) remains slightly higher compared to hybrid vehicles, BEBs are the most cost-effective option today for reducing bus transit emissions. As vehicle technology continues to advance — battery costs are declining while range…

Widespread use of PTC systems is likely to prevent collisions and save lives. PTC systems reliably and functionally prevent train-to-train collisions, overspeed derailments, incursion into established work zones, and movement through a mainline switch in the improper position, among other functions. To mark this accomplishment, I reflected on the evolution of some of the technology…