" It's not even very difficult", says Lars Christensen, founder and director of the Inventor's Consortium PL Brake. Inventors from PL Brake have been aware of the counter-flow hazard for quite a long time, and in 2001 started a development project capable of rendering such drivers “hors de combat”. The system could have prevented the recent tragic accident - which made two small children orphans - had the system been in use on Danish motorways.