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Originally Posted by Dengler Avenue
Does that mean MTO can upgrade the within-city segment of Thunder Bay Expressway cheaply by simply adding overpasses and interchanges without putting barriers between the 2 directions? 
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There are no rumble strips on the centre line of the expressway, but it has a wider painted yellow median. The expansion plans all call for twinning the road with a ditch between the two directions.
I was referring to a couple of the at-grade intersections where there is space for double left turn lanes, but the outer left turn lane is replaced by concrete pads with rumble stripping on them. They're located across from double left turn lanes, but the direction they're going sees so little traffic, the MTO didn't install the outer left turn lane, and the rumble strips are there to ensure vehicles don't use it, although in every case there is room to safely make a double left turn and a corresponding lane to turn into, though that lane gets used up by an on-ramp coming from the opposite direction.
There are concrete pads and rumble stripping in the outer left turn lanes of the southbound directions on 11/17 at Dawson Road and John Street, northbound at the terminus of Highway 61 with 11/17 and Harbour Expressway (since left turns in that way are rare) and northbound on 61 at Arthur Street. There would be on the on eastbound turn of 11/17 and 61 and Harbour, but the left turn lane on the opposite side isn't twinned even though traffic levels warrant it. If they didn't have an extra lane due to the combined RIRO intersection to Innova Park and the offramp to northbound 11/17 that intersection would be a mess, as the left turn lane regularly backs up nearly 1km at rush hour. That left turn lane itself is nearly 300m long but still not long enough to fit all the vehicles turning left there during the heaviest traffic.
I think a few spots near on and off ramps have rumble stripping between the road surface and the shoulder as well just to keep drivers on the road.
Quote:
Originally Posted by Dengler Avenue
My other question about rumble strips in winter is as follows: If they remain effective while covered by snow, why do head-on collisions still happen on Autoroute 50 during winter? Or are those things of the past now?
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They don't prevent all collisions, but they help.