rEvolving Transportation

Sharing information about Traffic Signals, Bicycles, Technology, and the Urban Form. I work for the City of Portland. The views expressed on this blog are my own.

Wednesday, July 9, 2025

To Lead or be Exclusive... for Pedestrians at a Traffic Signal

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  A fellow APBP member asked the following question: a topic that keeps coming up is the idea of using exclusive pedestrian phases versus ot...
Wednesday, June 25, 2025

Response to: Traffic Engineers Are Wasting Trillions and what we need to do about it

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  Traffic Engineers Are Wasting Trillions and what we need to do about it My initial response to this article was: where in the world have I...
Tuesday, May 6, 2025

Bicycle signing/markings and traffic signals on the ITE Community

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  Thanks for starting the discussion Jerry, lots to unpack here. The ITE Bicycle Signals Resource Hub has   some information at the followin...
Monday, June 10, 2024

Killed by a Traffic Engineer - Book Review

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I haven't read the book, but did   review the interview here.   I would agree with the author and the premise that we aren't going t...
Wednesday, December 20, 2023

New MUTCD and the Safe Systems Approach

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    The 11th Edition of the MUTCD is out now!   The role of the MUTCD has been something that I have thought a lot about in my 25 plus years...
Tuesday, January 24, 2023

Response to America Has No Transportation Engineers

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An engineer wrote an article titled: "America Has No Transportation Engineers", critiquing the civil engineering education that ma...
Thursday, April 11, 2019

incorporating walking and biking into Traffic Impact Studies

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For developments coming in, we (like everyone else) require traffic studies to be performed for  impacts related to streets,  traffic...
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