Sign in to follow this  
Followers 0
seanc06

Traffic Signal questions

13 posts in this topic

I am taking the PE in a few weeks in the Transpo depth, and I had heard that there are a lot of signal timing questions on the recent exams. I'm just curious... does anyone know what types of questions are asked? Also, where can I go to get forumlas for all of the timing parameters, because the CERM is a little lacking when it comes to that information. For example, I had a question on the 6 minute solutions that asks to come up with the minimum cycle length based on the Webster's formula... and I can't find that forumla anywhere!

Thanks!

Share this post


Link to post
Share on other sites

On your first question, no one is allowed to tell you about the type or specifics of the questions that were asked on the exam. We are bound by a written agreement. What I can offer is this, if a subject is on the NCEES published list then it can appear on the test.

Traffic Engineering Handbook will give you the information you are seeking for Traffic Signal timing. Refer to HCM Chapter 16 for Webster's formula.

Please tell me that you have looked at these references beyond "Roadway Design" type questions. If you haven't then I strongly suggest you know what these references contain. Something tells me that you haven't looked at right places when you say that you can't find it anywhere. Consider taking the NCEES listed references to the exam. You WILL need to refer to references beyond CERM for Transportation Depth.

You can also refer to Traffic Engineering textbook by Hoel & Garber for additional information.

Share this post


Link to post
Share on other sites

Thank you for your help. I've definitely been studying all of the required transportation topics, and have been utilizing all of the references, including the HCS and the ITE Traffic Engineering Handbook. The traffic signal timing stuff was the only subject that I couldn't really find the forumlas and such that I needed, but I guess I just wasn't looking hard enough in the right places.

Thanks again.

Share this post


Link to post
Share on other sites

I'm lazy. Chapter 16 is huge. What page number?

Share this post


Link to post
Share on other sites
I am taking the PE in a few weeks in the Transpo depth, and I had heard that there are a lot of signal timing questions on the recent exams. I'm just curious... does anyone know what types of questions are asked? Also, where can I go to get forumlas for all of the timing parameters, because the CERM is a little lacking when it comes to that information. For example, I had a question on the 6 minute solutions that asks to come up with the minimum cycle length based on the Webster's formula... and I can't find that forumla anywhere!

Thanks!

Edited by markos

Share this post


Link to post
Share on other sites

Webster method is used to calculate the optimum cycle length for an intersection. You can find the formula on ITE handbook under traffic signals.

Share this post


Link to post
Share on other sites
I'm lazy. Chapter 16 is huge. What page number?

See page 16-21 for Webster deley formula and more info on 16-99

Share this post


Link to post
Share on other sites

Tanya,

Thanks for the help. Vishal is being greedy with the info.

Share this post


Link to post
Share on other sites
Tanya,

Thanks for the help. Vishal is being greedy with the info.

It is you who is taking the test, not me. If you are lazy to go through a reference that you will be using on your test then I don't feel like you have earned any help. Lets just say that I was lazy to look that info for you!!

Share this post


Link to post
Share on other sites
It is you who is taking the test, not me. If you are lazy to go through a reference that you will be using on your test then I don't feel like you have earned any help. Lets just say that I was lazy to look that info for you!!

Well said!

Share this post


Link to post
Share on other sites

Let's just say I have better things to do with my life than spend it looking up an equation which I will never see again. You guys really need to get out more.

Good luck anyways.

Share this post


Link to post
Share on other sites

YOur reply was void of compassion ... You did not need to be so harsh with your reply .

Share this post


Link to post
Share on other sites

like

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0