SignalTraffic Forums

by **steven1981** on Mon Mar 11, 2013 9:47 pm

If I remember correctly, a couple of those two-section traffic signals once existed outside of Washington D.C.

by **signal262** on Thu Mar 14, 2013 8:52 pm

traffictechgreg wrote:I remember when I lived in Southern Alberta when my dad had a visiting professorship up there, about 20 years ago, Calgary was starting to get into bimodal arrows. They always used 2 red lights on their LT signals so you started to see 3 sections with 2 reds and a bimodal on the bottom. Alberta always flashed the green arrow, so the bimodal didnot pose a color blind problem. Not as bizzare as that 2 section though

I posted an inquiry about the two headed signals thru the Regina city government website. A traffic engineer from there called me today to explain the setup. They use the green arrow on flash for left turns, so there is a distinction between that and the yellow arrow (on the shared LED head). On single lane left turns, they have tended to use a three head signal with the upper two heads as red (redundancy).

by **coyttl** on Thu Mar 14, 2013 9:08 pm

I thought all of Canada used flashing arrows for protected lefts/rights?

by **notMUTCDcompliant** on Thu Mar 14, 2013 9:23 pm

Normally it's flashing balls, not arrows

by **coyttl** on Fri Mar 15, 2013 7:10 am

notMUTCDcompliant wrote:Normally it's flashing balls, not arrows

Oooh! didn't know that. I probably need to get up to Canada someday. :rotfl:

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