What is the appropriate placement for emergency warning signs on a two-lane, undivided highway?

The appropriate placement of emergency warning signs on a two-lane, undivided highway is crucial for ensuring safety and providing adequate warning to drivers. The placement of warning signs at specific distances allows approaching vehicles enough time to react appropriately to potential hazards.

In this context, the first part of the answer specifies placing the sign 100 feet in front of the hazard. This distance is significant because it gives drivers a clear and timely advance warning of a potential danger, allowing them to prepare to respond, whether that means slowing down, maneuvering, or taking other necessary actions. The second part of the answer indicates a requirement to place signs just 10 feet behind the hazard. This placement serves as a secondary indicator for drivers who may not have noticed the sign ahead or who need reinforcement that they are approaching a hazard.

Overall, the combination of these distances balances the need for early warning with the practical limitations of space and visibility on highways, ensuring that drivers are both informed and alert as they approach hazardous conditions.