Browsing Archive: September, 2014

Creative Pedestrian Signal

Posted by Steve Fitzsimons on Friday, September 26, 2014, In : For the General Public 
There are signalized pedestrian crossings in many large cities.  Getting pedestrians to take full advantage of the signals and stay safe is often a challenge.  Here is how one US city is being creative:

http://howtoinstructions.tips/this-dancing-crosswalk-signal-is-designed-to-keep-pedestrians-safe-and-happy/

And here is an alternative from Germany:

http://www.youtube.com/watch?v=C3Ozz6_pdMI


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GPS Clocks

Posted by Steve Fitzsimons on Friday, September 12, 2014, In : For Traffic Signal Designers 
Question:  How do I tell if a traffic signal controller is equipped with a GPS or satellite clock?
Answer:  The first clue is shown in the photo below.  There should be an antenna on the top of the cabinet, often referred to as a puck because of its shape.  

Inside the cabinet the unit is typically mounted in the back, near the top of the rack, as shown in the photo.  In this case it is a McCain clock unit.  

The black cable connects to the antennae.  The grey cable connects to the controller un...
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Terminal strips

Posted by Steve Fitzsimons on Thursday, September 4, 2014, In : For Traffic Signal Designers 

Terminal compartments are part of a traffic signal installation that allows circuits to be connected without using splices in pull boxes.  The picture below shows what is inside.  There are two pictures of the same terminal strip, taken from either side.  In the first picture you will see the posts numbered from 1-12.  The posts go all the way through.  In the second picture you can see single wires attached to 6 of the posts.  You can attach up to 3 wires per side, or 6 wires total. 

 


So...


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About Us


Steve Fitzsimons If you would like to ask a question about driving rules, traffic signals or street lights, send your questions to: SFitzsimons@W-Trans.com or call 650-314-8313. Steve Fitzsimons is a professional Civil Engineer and Traffic Engineer in California. He is a principal at W-Trans. Find out more about W-Trans at www.w-trans.com **** If you need a traffic signal design or review, W-Trans is available for hire. If you are an electrical contractor, W-Trans is available for hire to prepare timing plans or traffic control plans.

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