All cars should be taxis

Lift sharing with strangers can be a bit daunting. The person might not pay up or may be an axe murderer. If all cars were set up with an contact card reader (e.g. Oyster) then people could easily pay without worrying about cash. Additionally, the details recorded in the card reader would provide some security. Cars could also be fitted with displays saying where they are going, allowing people to flag down a car that is going in the same direction. This "flagging" need not be by hand, but could be done on a mobile phone, which communicates with cars in the area.

There are insurance implications to lift sharing, but the law could be changed to force insurance companies to cover life sharing by default.