Want to ask a question? Click here

Why does the left turn arrow on northbound College Road and Holly Tree only flash yellow?

Ken Little
StarNews
Traffic light

An answer from Denys Vielkanowitz, signal systems management engineer for the city of Wilmington.

The situation could be due to any one of several reasons, said Denys Vielkanowitz, signal systems management engineer for the city of Wilmington.

He said that under certain circumstances, there is a minimum amount of time, or delay, that a vehicle must wait to be recognized by the traffic signal controller.

“For this type of left turn, 15 seconds is typical. This delay is useful in light traffic conditions because the green arrow is not always necessary for someone to make the turning movement. Under heavy traffic conditions, a vehicle will typically meet this delay and the arrow will appear at the next available time,” Vielkanowitz said.

He said the second possibility is that the vehicle detector loop, located in the road behind the stop line, may be malfunctioning.

“Any time you put electronics outside, it is constantly being subjected to Mother Nature and the stress and friction of vehicles that drive over it,” Vielkanowitz said.

A third possibility, he said, is that a vehicle stopped to turn left may have stopped past the stop line.

“Vehicle detector loops are located behind the stop line. Therefore, it is important to remember not to cross the stop line while waiting for a traffic signal,” Vielkanowtiz said.

“We will inspect this location and take the necessary action to repair the issue,” he said.

User-contributed question by:
Bill Trant

Got a comment about this post or know more about the answer? Click here to let us know!


Bookmark and Share

X
Ask a question
X

Ask a question

If you’re looking for answers about living in coastal North Carolina, you’ve come to the right place. If we don’t have the answer to your question, we’ll find out or try to find someone who does. Hey, that’s our job! So, ask your question below and we’ll do our best to find the answer. Once we do, we’ll post it in an appropriate category.





Can we use your name to credit you by name (no e-mail or other contact information) with this question when we post an answer?
Yes
Your question:

Post a comment
X

Talk to us!

Have a comment about this post or know more about the answer? Use this form to let us know. Note that all comments are moderated and must be approved before they are posted, although you may see your own comments the first time you post them.





Your comment: