Home > News > Content
Traffic Countdown Control Requirements
Aug 17, 2015

First, the use of traffic control traffic countdown timer, start time requirements are as follows:

    1. Should be displayed according to the instructions of the road traffic signal control machine;

    2. The communication with the road traffic signal controller is performed at least once per second;

    3. When the communication is interrupted, or when the road traffic signal control machine is switched from automatic control to manual control, the traffic countdown display should be able to display a black screen within 2 seconds.

    Second, the use of follow-up control of the traffic countdown timer, start-up time requirements are as follows:

    1. When the road traffic signal control machine is turned on, the signal cycle is changed or the road traffic signal control machine is transferred from automatic control to manual control, the follow-up traffic countdown timer shall enter the following state, and the following time shall not exceed 2 signal cycles;

    2. The countdown display should show a black screen during the follow-up period;

    3. When the road traffic signal controller interrupts output or switches to yellow flash control, the traffic countdown timer should be able to display a black screen before the end of the current phase;

    4. When the phase of the road traffic signal output signal ends early, the traffic countdown timer should be able to display a black screen before the current phase ends;

    5. When the road traffic signal output signal phase time is extended, the traffic countdown timer should be able to decrease by one second to display a black screen within 0.1 s.

street light timers.jpg

    Third, the use of triggered traffic control countdown timer, start time requirements are as follows:

    1. The specific signal driver phase of the control signal of the road traffic signal controller will be output once as the trigger signal output, and the traffic countdown timer will start to display after receiving the trigger signal;

    2, the effective trigger signal duration range should be 150ms ~ 300ms;

    3, fixed-time display time can be set in advance or follow the trigger signal set;

    4. For the traffic countdown timer that sets the display time in advance, it should start normal timing and display after receiving the first valid trigger signal;

    5. The follow-up time of the triggered traffic countdown display shall not exceed one signal cycle, and the traffic countdown shall display a black screen during the follow-up;

    6. When the road traffic signal controller interrupts output or switches to yellow flash control, the traffic countdown timer should be able to display a black screen before the end of the current phase;

    7. When the signal phase after the road traffic signal output trigger signal ends early, the traffic countdown timer should be able to display a black screen before the end of the current signal phase;

    8. When the signal phase time of the road traffic signal output trigger signal is prolonged, the traffic countdown timer should be able to decrease by one second to display a black screen within 0.1 s.


We're Here to Help

  • Shaanxi Yiyuan Traffic Technology Engineering Co.,Ltd

    Tel: +86-29-88270591

    E-mail: sxyyjt@sx-yyjt.com

    QQ: 1829090767

    Zip: 710065

    Address: No.5, Production Road, West Thermal Power Plant, West Section Of Hongguang Road, Weiyang District, Xi'an, Shaanxi, China

Newsletter

Enter in your email address to receive deals
and coupons.
Bookmark us today!