DAF has introduced night locks -
http://www.daf.com/EN/News-Media/New...Nightlock.aspx
An example -
TDW Distribution insists a cab lock device is the reason why one of its drivers avoided a gas attack in Spain. According to TDW Distribution of Ammanford, South Wales, the employee was the only one out of five drivers to escape a gas attack and robbery in an HGV park near Barcelona.