Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [traffic-intersections]

The tag has no usage guidance.

1
vote
0answers
23 views

Specific Questions about Traffic Signal Preemption at Grade Crossings

Several questions, regarding traffic signal preemption at a grade crossing Is the preempt relay, which triggers the preemption sequence, located inside the bungalow which houses the grade crossing ...
3
votes
2answers
100 views

What is the starting/stopping sequence of a traffic light

As is probably known a traffic light may be turned off in which case normal rules applies to the intersection. While the traffic light is active then red & red+yellow means that drivers are ...
0
votes
1answer
65 views

What are the disadvantages of free-flow intersections?

I've recently learned about free-flow intersections. In particular, the DCMI, and the Stack interchanges. What are the disadvantages of using them, compared to the "normal" signaled intersections? do ...
3
votes
1answer
108 views

How can traffic signal controllers handle multiple conflicting preemption requests of equal priority without dropping one?

Let us assume that we are North American traffic engineers, and have the (hypothetical, plausible, yet pathological) intersection configuration depicted (not to scale and lacking lane lines, sorry -- ...
2
votes
1answer
158 views

What's the purpose of a 'burger' lane in a roundabout?

I recently read about a newly proposed 'burger' lane across a roundabout. burger lane plan http://www.gloucestershirelive.co.uk/images/localworld/ugc-images/276271/Article/images/29745204/15574035-...
4
votes
2answers
118 views

How do you call the intersection with barrier and you can always right turn?

In the photo above I can name the first 3 intersection a) Regular intersection b) T intersection c) Skewed intersection I am having a hard time on identifying the fourth intersection, what do you ...
1
vote
2answers
98 views

Historically, how did tram switches work?

Historically, the switches on regular railways were switched manually using a lever by dedicated staff to route trains correctly before getting replaced by an automatic electronic system. A similar ...
0
votes
0answers
164 views

How to extend green light using NTCIP protocol?

I am working on a traffic control system using the NTCIP protocol and a ASC/3 econolite controller along with Dedicated Short Range Communication (DSRC) technology. In this technology what happens is ...
7
votes
1answer
1k views

How are train crossing signals and highway traffic signals coordinated?

Some roadway intersections that are near railroad tracks have signs that light up when a train is approaching. These signs warn that certain turns are not allowed because of the train. One of these ...
3
votes
1answer
257 views

When are Single Point Urban Interchanges used?

There is a topic discussing the pros and cons of roundabouts. A less common intersection is the Single Point Urban Interchange (SPUI). This is an intersection that seems to be mostly used on ...
5
votes
1answer
206 views

Best traffic control device/system for given situation

I am familiar with the round-a-bout/traffic light pros and cons, however, I've been tasked with deciding on a solution for the given parameters below. Currently, there is a two-way (four lane) road ...