The passengers divide into two teams, left and right. Any odd number going to assist the driver's team since the driver should be concentrating on the road...
Each team tries to find the letters of the alphabet, in the correct order, on signs on 'their' side of the road. Multiple letters may be used from one sign as long as they are seen in the correct order. Whilst looking for Q, antique shops and BBQ adverts are highly valued. As the letters are found they must be called out to let both your team members and your opponents know what you are looking for. (Exclude writing on vehicles.)