The show is filmed using high-definition cameras mounted within and outside the car. Llewellyn drives his guest to a destination of their choosing as they talk informally about various subjects. As Llewellyn is driving for the majority of the time it can be difficult to deal with technical problems, especially interference from mobile phones.
The show, based on the web format, is developed by RDF Contact, and fully funded by Toyota, who also sponsor the show. Carpool was first broadcast on Dave on 4 November 2010.
Carpool has been shortlisted for best content partnership in Broadcast Awards.
In an August, 2011 update of the web series, Llewellyn announced that the show would stay as a web-exclusive and that no more made-for-television episodes would be made.