Heat waves are becoming an increasingly pressing issue for public transit systems, and the impact is only set to grow as climate change intensifies. While the health risks associated with extreme heat are well-documented, the strain on transit infrastructure is a less discussed but equally critical concern. In this article, I will delve into the ways in which heat waves are making public transit less reliable, the implications for both workers and passengers, and the steps that transit agencies can take to mitigate these consequences. From the mechanical and electrical systems of buses and trains to the very tracks they run on, extreme heat is putting a strain on transit infrastructure, and it's time we take notice.
One of the most immediate effects of heat waves on public transit is the increased risk of delays and service disruptions. As temperatures soar, the mechanical and electrical systems of buses and trains are put under immense pressure. These systems, designed to operate within a specific temperature range, can become overloaded when exposed to extreme heat. The cooling process, which is essential for their operation, demands additional energy, and if these systems are not adapted for such conditions, they can fail, leading to service interruptions.
The impact of this is particularly evident in the case of the Toronto Transit Commission (TTC). During the recent heat wave, the TTC had to notify customers of reduced speeds on Line 1 and Line 2 subway trains through open areas. Commuters on the Line 5 and Line 6 LRTs were also asked to push the door button when boarding and exiting due to the hotter temperatures. These measures are a direct result of the strain on the transit infrastructure, and they highlight the need for transit agencies to adapt to the changing climate.
Another critical issue is the phenomenon of buckling. As metal train tracks expand under extreme temperatures, they can deform outwards, leading to the risk of derailments. This was evident during the heat wave, when an Ontario resident shared on social media that her commute trip was significantly impacted after two of her GO trains got delayed, while another one was interrupted during the trajectory due to derailment risks. The buckling of tracks is a serious concern, as it not only disrupts services but also poses a risk to the safety of both workers and passengers.
The effects of heat waves on public transit are not limited to infrastructure issues. Extreme heat also poses significant health risks to those who work to keep transit running. Electrical and mechanical workers, who are often exposed to the elements, can face serious health risks when working during temperature peaks and under the sun. Transit agencies must consider scheduling work during cooler periods and ensuring that workers take more breaks to mitigate these risks.
For passengers, the implications are equally concerning. Transit systems must be designed to provide a comfortable environment for commuters, especially during heat waves. This includes ensuring that air conditioning units are functioning properly and that the interior temperature is maintained at a comfortable level. Transit agencies should also consider implementing measures such as adjusted working times and increased break frequencies to ensure the safety and well-being of their workers and passengers.
So, what can be done to mitigate these consequences? According to Nicholas Roberts, Associate Vice President, Goods Movement, Ports and Marine at CPCS, there are several steps that transit agencies and governments can take. Firstly, they can focus on hardening or protecting infrastructure, which includes building new infrastructure that is adapted for hotter days or rehabilitating existing infrastructure. For example, overhead electrical wires that provide power to the vehicles can sag during heat, but tensioning mechanisms can be placed on the ends to straighten them back up.
Another solution is to relocate existing infrastructure or services to cooler areas. This could involve replacing pieces of equipment or electrical systems to a shaded area or building structures around them to ensure they are not exposed to direct sunlight. Lastly, agencies should adjust their operations to make sure workers and passengers stay cool and safe, such as adapting working times, increasing the frequency of breaks, and informing them about risks.
In conclusion, heat waves are having a significant impact on public transit systems, and the implications are far-reaching. From the strain on mechanical and electrical systems to the risk of derailments and the health risks to workers and passengers, it is clear that transit agencies must adapt to the changing climate. By focusing on hardening or protecting infrastructure, relocating existing infrastructure or services, and adjusting operations, we can ensure that our transit systems are able to keep up with the heat. But it's not just about adapting to the present; it's also about preparing for the future. As climate change continues to intensify, we must take proactive steps to ensure the resilience of our transit infrastructure, and that means investing in climate-resilient projects and programs. Only then can we ensure that our transit systems remain reliable and safe for generations to come.
