Etiquette guide Debrett's has issued a guide to polite motoring in modern-day Britain.
The 47-page book promises to teach drivers the "right and proper way to behave behind the wheel".
Advice includes telling motorists they should open the door for female passengers, ask if the music, and air-con setting is okay and taking a break if you're getting annoyed.
Motorists are also advised not to sing in the car unless they're a pro, make sexist jokes about women or hoot the horn in an angry fashion.
Debrett's adviser Jo Bryant said: "Driving is an area where people often forget their manners and display aggressive behaviour. Being considerate on the road is important."