Where is the only appropriate area to stop on an expressway in case of an emergency?

The shoulder of the road is the only appropriate area to stop on an expressway in the event of an emergency. This area is specifically designed for vehicles to pull off the road safely, allowing for emergency situations without obstructing the flow of traffic. Stopping in the travel lane or left lane can create a significant hazard, as it may lead to collisions with other vehicles that are traveling at high speeds. The shoulder is typically wider and provides a buffer zone between the moving traffic and the stopped vehicle, enhancing safety for both the driver and other road users. Using any other area would not only be unsafe but could also be illegal, contributing to dangerous conditions on the expressway.