Why does car overheat around town but not on highway?

Cars often overheat around town due to frequent stop-and-go traffic, which can lead to insufficient airflow through the radiator and reduced cooling efficiency. In contrast, highway driving typically provides consistent airflow and higher speeds, allowing the engine to maintain optimal operating temperatures. Additionally, lower RPMs and less strain on the engine during highway driving help prevent overheating. Other factors, such as a malfunctioning cooling system or low coolant levels, can also contribute to overheating in urban settings.