Joshua Saak, P.E., PTOE Traffic Design Engineer Ada County Highway District May 23, 2013

Transcription

1 Joshua Saak, P.E., PTOE Traffic Design Engineer Ada County Highway District May 23, 2013 Creating Great Streets Through Road Diets and Conversions The Charlotte Experience

2 Topics to Discuss Charlotte s movement to Complete Streets Charlotte Road Diet - Case Studies

3 27 road diets - completed 20 more being studied 1 1 East Boulevard - Complex 2 2 Selwyn Ave. - Simple

4 East Boulevard Complex! Phase II ,800 Phase III ,300 Phase I ,100 Office Retail centers Multi-family Major Hospital Park/greenway Bus Route

5 More comfortable for all roadway users bikes, pedestrians, transit users and motorists Enhance pedestrian activity on sidewalks Facilitate neighborhood connectivity Sidewalk cafés/outdoor seating What did the Residents Want?

6 How did we advance the project? Not able to accomplish the neighborhood s vision without changing the corridor Conducted detailed traffic simulation (Synchro) Worked with residents/businesses through PIMs Created advocates for the project

7 40 feet wide Phase 1 - Before

8 Phase 1 After Before Concept Benefits

9 15 feet East Boulevard Phase 1 - After

10 Charlotte Observer, June 2004

11 From Charlotte Observer (June 2006) Comments made during construction

12 Judge the Project at Completion

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14 70 feet wide Phase 2 - Before

15 East Boulevard

16 East Phase I Volumes 2000 East Blvd Phase I - Before vs. After 1500 All Traffic Volume 1000 Westbound All Before WB Before All Before EB Before WB Before All After EB Before WB After EB After 500 Eastbound Hour

17 East Phase II Volumes East Blvd Phase II - Before vs. After All Traffic Volume Westbound All Before EB Before All Before WB Before EB Before All After II WB Before EB After II WB After II 400 Eastbound Hour

18 Phase II Speed Results Eastbound 85th Percentile Speed EB Before EB After Peak AM Off-Peak AM Off-Peak PM Peak PM Westbound 85th Percentile Phase mph drop Phase 2 bigger drop Speed WB Before WB After Note: Speeds recorded and calculated using Nu-Metrics HiStar Peak AM Off-Peak AM Off-Peak PM Peak PM

19 East Blvd. Phase I Crashes Overall crashes decreased from 2.64 to 1.67 crashes/month Related Crash Type Expected To Rear End Increase Angle Types Decrease Sideswipe Decrease Head-on Decrease Parked Decrease Unrelated??? Results % Crashes/Month - 22 % % % % % % Crash Type Expected To Before After Bike??? 1 12 Pedestrian??? 1 2 Before data: After data: 36 months 57 months

20 East Blvd. Phase II Crashes Overall crashes decreased from 1.97 to 1.86 crashes/month Related Crash Type Expected To Rear End Increase Angle Types Decrease Sideswipe Decrease Head-on Decrease Parked Decrease Unrelated??? Results % Crashes/Month % % % % % % Crash Type Expected To Before After Bike??? 0 0 Pedestrian??? 2 0 Before data: After data: 36 months 21 months

21 Selwyn Avenue Simple! Single Family Multi-family University & Public Schools Retail centers Park/greenway 20,300 AAWDT Road to be resurfaced 4 lanes or 3 lanes?

22 Conversion Typical Section Before Concept 40 feet wide

23 Selwyn Avenue After

24 Selwyn Avenue Road Diet

25 Selwyn Volumes Selwyn Avenue Before vs. After Conversion Volumes Volume All Traffic Change in Peak Hour OB = -9.32% Change in 3-hour OB = +0.32% Outbound All Before Inbound Before All Before Outbound Before Inbound Before All After Outbound Before Inbound After Outbound After 500 Inbound Hour

26 Selwyn Speed Results 50 Southbound 85th Percentile Speed SB Before SB After Peak AM Off-Peak AM Off-Peak PM Peak PM Northbound 85th Percentile Speed NB Before NB After Note: Speeds recorded and calculated using Nu-Metrics HiStar Peak AM Off-Peak AM Off-Peak PM Peak PM

27 Selwyn Crashes Overall crashes decreased from 1.97 to 1.67 crashes/month Related Crash Type Expected To Rear End Increase Angle Types Decrease Sideswipe Decrease Head-on Decrease Parked Decrease Unrelated??? Results % Crashes/Month + 90 % % % Zero Before and After % % Crash Type Expected To Before After Bike??? 0 0 Pedestrian??? 0 0 Before data: After data: 36 months 21 months

28 Lessons Learned Project should begin at neighborhood level what do they want from their street? Seems counterintuitive - need to educate show examples Get Council/Commission and neighborhood on board Build advocates for the project

29 Visuals are worth a 1000 words Construction period will be difficult especially with islands and stamped crosswalks Weather the storm during construction be proactive with media Do before/after studies Lessons Learned

30 Questions?