![](http://www.alamy.com/thumbs/6/AF92F8F5-8A66-4DDE-85EF-2F916CA3ADDC/ECWMH7.jpg)
Speed Indicator Device (SID) on a 30 mph mile per hour stretch of road: it displays speed of approaching car / vehicle.
Speed Indicator Device (SID) in Twickenham, west London, on a 30 mph mile per hour stretch of road: it displays speed of approaching car / vehicle. (74)
Size: 2904px × 4352px
Location: Twickenham, west London, UK
Photo credit: © David Gee / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 26, activated, alert, automatic, car, detect, detecting, detection, display, displays, driver, drivers, emoticon, england, english, equipment, excess, excessive, faced, fast, gee, high, hour, indication, kills, kingdom, limit, mile, miles, modest, mph, radar, radars, real, road, roads, sad, sadly, safety, sid, sids, sign, signs, smiley, smily, speed, speeding, speeds, street, streets, time, traffic, trap, twenty, uk, united, vehicle, vertical