Back Seat Driver

A back seat driver is a passenger in a vehicle who is not in control of the vehicle and does not appear to be comfortable with the skills of the current driver and/or feels the need to tutor said driver.
Some backseat drivers exhibit this type of behaviour simply because they feel unsafe or out of control since they are not driving the vehicle and therefore are nervous and jumpy and overly anxious to give suggestions and criticisms regarding the current drivers actions. The Maine Department of Transportation has a web poster "Are you a Good Back Seat Driver?" asking "True or False: Being a Backseat Driver means it is okay to be noisy or distracting to the driver as long as you are giving them safety tips." The Inland Register produced by the Roman Catholic Diocese of Spokane makes use of it in a sermon: "Even our phrase “back-seat driver” reflects this new-found freedom. Which of us who has graduated to the status of driver enjoys a passenger, especially one out of reach in the back seat, who seems to know how to drive better than we do? "
The Art of being a Backseat Driver in the San Bernadino sbsun summarizes various comments of the sort otherwise found in multiple blogs. Some are specialized, such as the Back Seat Driving blog, formerly the "LA Car Blog."
A famous example of a back seat driver is Hyacinth Bucket on the British sitcom Keeping Up Appearances. The term is also used in Backseat Drivers from Beyond the Stars, an episode of Invader Zim A poem "The Backseat Driver" by Parick G Hughes appears in the Northern Ireland BBC Writer's Showcase.
It is even used as a deliberate game. In All things Considered on NPR for July 19, 2006, there is an account of a "Back Seat Driver competition in Forest City, Iowa. ... The event -- in which a driver races backward while blindfolded and instructed by the voice of a companion over an intercom -- is in its eighth year." It has even been noticed by People's Daily .

Traffic Directionality

Traffic directionality refers to regulations requiring all vehicular traffic to keep either to the left or the right side of the road. Whether the right or the left is specified depends on the laws of each country. This is so fundamental to vehicular transport that it is commonly referred to as the rule of the road[1]. The purpose of the rule of the road is to facilitate traffic flow and reduce the likelihood of head-on collisions. About 34% of the world by population drive on the left, and 66% on the right. By roadway distances, about 28% drive on the left, and 72% on the right,[2] even though originally most traffic drove on the left worldwide.

Right-hand traffic

Oncoming traffic is seen coming from the left.
Left-turning traffic must cross oncoming traffic.
Most traffic signs facing motorists are on the right-hand side of the road.
Traffic on roundabouts (traffic circles or rotaries) goes anticlockwise (counter-clockwise).
Pedestrians crossing a two-way road should first look for traffic from their left.
Most vehicles have a left-hand driver's position, instruments and controls.