I've read with interest the various suggestions for reducing the problem of runway incursion, but I would take issue with Graham Smith (Flight International, 2 - 8 March) and his statement "the logic applied on roads, that a red light will never be crossed".

Mr Smith may be unfamiliar with driving in the USA, where it is (usually) permissible to turn "Right on Red". With the large number of US-trained pilots, the usefulness of his suggestion may be diluted as a result.

Peter Lewis Eastleigh, Hampshire, UK

Source: Flight International