When a tractor trailer is disabled on a two-lane roadway, where should emergency reflectors be placed?

The placement of emergency reflectors is critical for ensuring safety on the roadway when a tractor trailer becomes disabled. The correct choice indicates that reflectors should be set 100 feet from the rear of the vehicle and 10 feet along the side. This configuration is designed to provide adequate warning to oncoming traffic, allowing drivers enough time to react and safely navigate around the disabled vehicle.

By positioning the reflectors 100 feet from the rear, it creates a visual alert for vehicles approaching from behind well before they reach the disabled trailer, which is essential in minimizing the risk of collisions. The additional placement of reflectors 10 feet along the side helps increase visibility from the side, ensuring that vehicles approaching from different angles can detect the obstruction.

This comprehensive placement strategy is in line with established safety regulations and practices, which aim to protect both the occupants of the disabled vehicle and other road users. Roadway safety guidelines typically emphasize the importance of making sure that emergency warnings are visible from multiple directions, which is effectively accomplished by the arrangement indicated in the correct choice.