From Rob Mannion
Your news item on radar at level crossings made me extremely frustrated (13 November, p 4). I suggested similar technology over 30 years ago, when I was employed in the chief mechanical and electrical engineer’s department of the Southern Region of British Rail. At the time, a number of workers employed in track gangs had died after failing to hear new trains approaching at 160 kilometres per hour.
I suggested miniature pulsed microwave transmitters be fitted to all high-speed trains, with portable receivers for people working on the track. This was thought to be unworkable, since most engineers are under the impression that microwaves travel only in straight lines. Those with microwave experience understand that microwaves can be “ducted” and follow the curve of the track.
I also proposed that high-speed trains be fitted with obstruction warning radar. This could alert drivers without them needing to watch a screen. This system was also turned down as impractical.
Bournemouth, Dorset, UK
