© 2014 HDR, all rights reserved. I5-Broadway Weilder – Safety Analysis Jon Makler, ODOT Miranda Wells, HDR OR ITE Winter Workshop February 26 th, 2015.

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Presentation transcript:

© 2014 HDR, all rights reserved. I5-Broadway Weilder – Safety Analysis Jon Makler, ODOT Miranda Wells, HDR OR ITE Winter Workshop February 26 th, 2015

 I-5 Northbound/Southbound o Going to Morrison Ramps  Arterial Network o Broadway and Weilder  I-84 Eastbound Just past Grand Ramp Study Area

Emergency Braking = Deceleration Rate Greater than 14.8 ft/sec Existing Crashes Compared to Existing Calibrated VISSIM Results

Emergency Braking Southbound Event Analysis  In the no-build scenario (A2), there are roughly 80,000 events.  Most (84%) events occur north of Broadway.  In the “facility plan” scenario (B2), there are roughly 35,000 events SB (57% reduction).  The basic braid (c2) sees more events SB (38,000) compared to B2.  The “double braid” scenario (C2) has 36,000 events SB – in between B2 and c2.  Adding the two-lane flyover makes each scenario safer SB.  All the “build” scenarios reduce SB events north of Broadway by more than 60%. Only the braid options reduce SB events south of Broadway by a significant degree and the double-flyover makes a big difference. Going to Broadway Broadway to Morrison Total A155,52912,81863,348 A268,10613,28981,305 B113,07816,75929,837 B218,20316,30634,509 C119,3917,20926,600 C225,9859,82635,810 c118,1707,18325,352 c227,89010,31538,206

Why Emergency Braking? Closely Spaced Interchanges and bottlenecks spilling back into the study area are not accounted for in deterministic safety analysis. What are the Results Showing? Overall significant reductions in emergency braking instances for all the Build Options Adding a two lane flyover for the braided options improves safety on I-5

 Southbound visual representation of data Heat Maps

Weilder – I-84 Weave

Contact Information: Miranda Wells, PE Traffic Engineer HDR Questions?