vehicles meet head-on, generally the drivers confer to decide in which direction lies the closest wide spot, and together they travel there, the lead vehicle necessarily in reverse gear. In Scotland, and places like the Isle of Man most drivers are accustomed to single-track roads. When opposing traffic is encountered, the first driver to reach the nearest passing place pulls over, no matter which side, and flashes the headlights to signal the other car to proceed forward. It is customary for both drivers to then acknowledge each other with a wave as they pass. At night, both drivers acknowledge each other by flashing their off-side direction indicators headlights immediately before or as they pass. It is extremely dangerous to flash headlights at close proximity on narrow unlit country roads at night as this affects drivers' night vision. Usually when there is a brief one-lane bottleneck of a two-lane road, traffic will usually yield to oncoming traffic already in the bottleneck. One-lane single-track roads usually have no conflict. In the United States, if the situation permits, both vehicles will pull off the road slightly and pass in this manner. Although saving time, this process can cause ruts and erosion along the edge of the road. For this reason, single track roads are generally used in places with very low traffic volumes, though one-lane stop-gap measures will have a STOP and YIELD on a sign construction workers flip. If there are no passing places or wide parts of the road then the start of the road is considered as the passing place. See also Country lane Trail Single track (rail) Sunken lane Reversible lane References External links Guide to single track roads in Scotland Single track roads on the Isle of Tiree Types of roads Roads in Scotland