The TSRGD came into force on 1 March 1957. The
Traffic Signs (Amendment) (No. 2) Regulations and General Directions 2011 (
SI 2011/3041), amongst many minor changes, provided for an optional dual-units (metric and imperial) height restriction warning triangle, changes to cycleway signage to allow estimated journey times to be flagged and the discontinuation of the use of the symbol "T" to mean
tonnes on weight limit signs. The current edition of the regulations is the
Traffic Signs Regulations and General Directions 2016 (
SI 2016/362), which came into force on 22 April 2016, with minor amendments in England and Wales in 2017. Earlier versions were: • '''''' (
SI 1957/13) • '''''' (
SI 1964/1857) • '''''' (
SI 1975/1536) • '''''' (
SI 1981/859) • '''''' (
SI 1994/1519) • '''''' (
SI 2002/3113) • '''''' (
SI 2016/362) ==
Traffic Signs Manual==