ODOT is working with stakeholders to develop a new method for speed zoning within Oregon. Nationally, there has been a reliance on 85th percentile speeds to set posted speeds. The proposed speed setting process will be based on work done in NCHRP 855 that expanded the functional class system using context and the work currently being done within NCHRP 17-76 developing new guidance for speed setting describing the factors that influence speed setting. [links added]The rest of the meeting agenda isn't all that interesting for our purposes here, but it's good to be alerted to this potential change on the 85th percentile doctrine. (As well as a shift in thinking on the functional classification system.)
Here are some of the slides from the presentation and a little bit of comment in captions.
|Current system is designed for "modest" speeding|
|Are they really going to embrace bicycling?|
|Maybe they are!|
Look at the proposed priorities for urban roads.
And see the difference between
a suburban principal arterial and one in the urban core
|Public comment only at the end?|
MWACT meets Thursday, April 4th at 3:30 p.m. in Courthouse Square, the Senator Hearing Room, 555 Court St NE.