When a traffic signal goes dark or a roadside cabinet loses power, the consequences are immediate and clear. Emergency vehicles can be slowed, commuters face longer travel times, and public works crews have to respond right away.
For cities, counties, and transportation departments, outages are more than a hassle. They can lead to traffic delays, extra labor costs, safety concerns, and added pressure on maintenance teams. Reliable backup power helps reduce those problems by keeping traffic systems running, supporting public safety, and helping agencies avoid costly disruptions.
Here’s why having consistent power matters, and how agencies can see the benefits.
Preventing Operational Disruptions
Even a short outage at a traffic signal or ITS cabinet can ripple through a city’s traffic network. A single dark signal on a busy main street can force emergency responders to take longer routes, back up side streets, and increase fuel use for everyday drivers. Every hour without power can increase costs through overtime, traffic delays, lost productivity, and additional maintenance. Backup power keeps intersections and cabinets running, preventing these problems before they happen and keeping traffic moving reliably.
Reducing Emergency Maintenance
When traffic systems fail without warning, maintenance crews often have to respond right away. That can mean working in unsafe conditions, like storms, extreme heat, or freezing weather.
These emergency calls usually cost more than planned maintenance because they require extra labor, vehicles, and coordination. Reliable backup power helps reduce those urgent calls, which can lower costs and keep field crews safer.
Reducing emergency callouts can improve maintenance efficiency and contribute to the long-term value of a backup power system.
Supporting Public Safety
Power outages slow traffic and put people at risk. A failed traffic signal or disabled signal preemption system can delay first responders, complicate evacuations, and increase congestion during emergencies. Backup power keeps critical intersections, signal preemption systems, and surveillance equipment running, ensuring public safety even when the grid goes down or during extreme weather.
Maintaining Data Integrity for ITS Systems
Modern traffic management depends on continuous information from signal controllers, detection systems, and connected ITS devices. Power interruptions can interrupt monitoring, data collection, and remote visibility, making it more difficult for agencies to manage traffic operations. Backup systems, including hydrogen fuel cells and hybrid battery solutions, help maintain continuous system availability during utility outages.
When agencies have consistent data, they can make better decisions on signal timing, corridor planning, and congestion management. Continuous power helps agencies maintain visibility into system performance and make informed operational decisions.
Planning for Extreme Events
Utility outages, storms, and Public Safety Power Shutoffs are becoming more common. Diesel generators require routine maintenance, fuel management, and emissions compliance, which can increase operational complexity over time. Some wildfire-prone municipalities have kept signals running for several days using hydrogen fuel cells, preventing detours and maintaining emergency routes when the grid was down.
Measuring the ROI of Backup Power
The value of backup power can be measured in fundamental, tangible ways. Agencies can calculate return on investment by tracking:
- Number of intersections or cabinets protected
- Hours of outages prevented per year
- Emergency labor and overtime avoided
- Equipment repairs or replacements avoided
- Estimated reduction in intersection downtime
- Improvements in travel time reliability across critical corridors
Even avoiding just a handful of outages each year can make a backup system cost-effective over its service life.
UPS battery backup
Battery UPS systems are often well suited for short-duration outages, while long-duration technologies such as hydrogen fuel cells can provide extended backup power for critical intersections and ITS infrastructure during prolonged utility outages. Selecting the appropriate technology depends on each site’s runtime requirements, power load, and operational priorities.
Conclusion
Reliable backup power helps keep traffic systems running when the grid goes down. It can support public safety, reduce emergency maintenance calls, help maintain reliable equipment operation over time, and reduce operational disruptions.
By assessing each site’s risks, environment, and power needs, agencies can choose the right backup solution, whether a hydrogen fuel cell system, a hybrid system, or another approach.
For transportation departments, public works teams, and municipalities that require long-duration, zero-emission backup power, HyMax solutions are designed to help keep critical intersections and ITS infrastructure operating during planned and unplanned utility outages.
FAQs
How can agencies decide which backup power solution is right for each site?
The right solution depends on the site’s power load, required runtime, available space, weather conditions, maintenance expectations, and the criticality of the intersection or cabinet to the overall network. A high-priority evacuation route may need a different backup strategy than a lower-volume intersection.
What should agencies review before installing backup power at an intersection or ITS cabinet?
Agencies should review the cabinet load, connected equipment, outage history, available installation space, fueling or charging needs, monitoring requirements, and maintenance process. Understanding these details upfront makes it easier to choose a system that fits the site and avoids undersizing the backup power source.
Can backup power help extend the life of traffic infrastructure?
Yes. Keeping equipment powered during outages can help reduce hard shutdowns, unexpected restarts, and emergency field visits. Over time, that can support more stable operation and reduce unnecessary stress on controllers, communications equipment, sensors, and other roadside systems.
Is backup power only useful during major storms or disasters?
No. Backup power is valuable during both major and routine outages. Even a short power interruption can affect signal timing, traffic flow, communications, data collection, and public safety. Reliable backup power helps keep critical systems running, whether the outage lasts minutes, hours, or longer.
