Ealing trial for lorry-cyclist warning system
26 November 2013 Last updated at 21:50 GMT
A west London council is looking to improve cycle safety by introducing new technology for lorry drivers.
A device to help detect cyclists approaching an HGV will be tested in Ealing.
BBC London transport correspondent Tom Edwards spoke to John Guest of Cycle Safety Shield, Martin Gorst of Ealing Cycling and Ealing Labour councillor Bassam Mahfouz.