Can you help solve this mystery?

A reader recently submitted a question regarding a strange occurrence at Hwy. 400 and the Anne. St. overpass in Barrie, Ont. Since we, at didn’t have the answer, we thought we’d call upon the power of the Internet and see if one of our faithful readers could help solve this mystery:
Good morning,
I have a question, to which I have not been able to find an answer, and would like to pose it to you and your team. I’m not involved in the trucking industry in any way, but have been wondering about this one for some time now.
I live in Barrie Ontario, right beside the Anne St. overpass on Hwy. 400. Obviously, there is a lot of truck traffic on this highway, but I’ve noticed one peculiar event. A very high percentage of trucks (say 5-15% or more) passing this overpass either “toot” their horns or flash their lights. I don’t see this happening at other overpasses, and I’m wondering what the story behind this is. The frequency of this occurrence is way too high to be coincidental.
Thanks for your time,

If you have an answer to John’s question, we’d love to hear about it here.

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James Menzies is editor of Today's Trucking. He has been covering the Canadian trucking industry for more than 20 years and holds a CDL. Reach him at or follow him on Twitter at @JamesMenzies.

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