When placing warning devices on a two-lane highway due to a disabled vehicle, where should reflectors be placed?

The correct placement of warning devices, such as reflectors, is crucial for the safety of both the disabled vehicle and other road users. When a vehicle is disabled on a two-lane highway, reflectors should be placed 10 feet in front or to the rear of the vehicle to provide immediate warning to approaching traffic. This close placement helps alert drivers quickly, allowing them to react in time.

In addition to the immediate warning, a reflector should also be placed 100 feet in front of the disabled vehicle. This further enhances visibility and gives oncoming traffic ample notice of the obstacle ahead. Placing another reflector 100 feet to the rear allows vehicles approaching from behind to notice the disabled vehicle well in advance, providing time to change lanes or slow down as necessary.

The combination of these three placements—10 feet in front or rear, 100 feet in front, and 100 feet to the rear—ensures a comprehensive warning system that maximizes safety for all motorists in the vicinity. Other choices may incorrectly suggest distances that either provide insufficient warning or place reflectors in ways that do not adequately alert approaching traffic about the disabled vehicle.