Search results
Results from the WOW.Com Content Network
The modern warning lights used on level crossings in the UK consist of one amber light at the bottom and two red lights at the top, all on a black board with a checkerboard outline in red and white (the red and white borders weren't introduced until 1992; the borders were just white beforehand).
Part-time operation: Some traffic lights will not operate at night or when traffic is very light. Some may only operate at particular set times (e.g. during working hours of a major factory) or only during special events such as sports or exhibitions. When not operating, the same measures as with failures are used.
Lights have not counted down, when 99 seconds are left, start counting. During the standby time, the light may be displayed as "99", "00", "--" or not displayed. Last 2 digits count light of the timeout (the counter light is 15 while the time is 115 seconds, there are some types of lights that count as "-9" or "9-" when the time is 109 seconds)
Ground position light [16] signals (GPLS), are always illuminated and are located either near the ground or on a post with no corresponding main signal. They can display the following aspects: Either two red lights or one white light and one red light in a horizontal arrangement, meaning 'Stop'. Two white lights at a 45° angle, meaning 'Proceed'.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
In New Zealand, where traffic is on the left, when a road is given a green light from an all-direction stop, a red arrow can continue to display to turning traffic, holding traffic back while a pedestrian crossing on the side road is given a green signal (for left turns) or while oncoming traffic goes straight ahead and there is no permissive right turn allowed (for right turns).
Yahoo faz parte da família de marcas Yahoo. O Yahoo coletará e usará seus dados como parte dos serviços oferecidos, para entender seus interesses e oferecer e mensurar anúncios personalizados.
The whole intersection is then programmed to operate a fixed time every cycle, but the controller will service the other movements only when there is a 'call' or demand. An arterial series of signals that are operating in a semi-actuated or fixed mode and importantly operating with the same cycle length can be made to function in a coordinated ...