Presentation from public meeting on OR126 @ Tom McCall pulbic meeting held in Prineville on 12-17-15.

1. OR126/Tom McCall
OR126/Tom
McCall
(Prineville)
Intersection
Improvements
December 17, 2015

2. Follow a public and transparent process
Corridor Plan and TSPs provide direction
Alternative Analysis by Kittelson & Assoc., Inc.
Highway/Civil Engineering using Best Practices
Can’t just pick a solution, must consider safety,
engineering, and available funding
Process

3. Problem OR126/Tom McCall
 Growth in traffic
 Extremely long queues and congestion
 Increased crashes
 Intersection becoming significant barrier to
economic development

4. Need
Safety - Intersection use is increasing as
surrounding land use grows
Purpose
Serve existing use and support future use from
development of nearby industrial land
Need and Purpose

5.  Design and construction of a roundabout
 Roundabout approach treatments to slow
traffic
 Re-route George Millican Road and Airport
Way
What is the OR126/Tom McCall Project?

6. Key goals include:
 Provide a high level of safety in high-speed
rural area
 Support economic development within the
City’s industrial lands
 Accommodate oversized freight movements
Key Goals OR126/Tom McCall

7. Project Background and Schedule
OR126 Corridor Plan (2012)
Prineville TSP (2012/13)
City/County Requests STIP Funding (2012)
Project Design/Stakeholder Outreach
(2015/16)
City and Freight Concurrence (2016)
Construction 2017/18
Design
Concepts
Design
Refinement

8. Kittelson & Associates, Inc.
Kittelson & Associates, Inc. – Traffic Analysis

9. Study Area

10. Existing Intersection Operations

11. Existing Safety Performance
OR 126 Intersection Number
of
Crashes
Million
Entering
Vehicles
(MEV)
Crash
Rate
(crash
per MEV)
Statewide 90th
Percentile Rate
Tom McCall Road 10 21.4 0.47 0.41
Airport Way-SW Millican Road 5 18.6 0.27 0.41
 5 years of historical crash data (2009-2013)

12. Future Intersection Operations – No-Build
Evaluation Year
Stop-Controlled
Approaches LOS V/C Delay (sec)
95th Percentile
Queue (ft)
OR 126 and Tom McCall Road
2035
Northbound F >1.0 >80 >500
Southbound F >1.0 >80 >500
OR 126 and Airport Way/SW Millican Road
2035
Northbound E 0.65 46.5 100
Southbound F 0.22 59.9 25

13. What is a roundabout?

14. What is not a modern roundabout?
Photo:CityofFortWorth,TX
Rotary Traffic Circle
Photo:GoogleMaps
Photo:LeeRodegerdts
Neighborhood Traffic Circle

15. Conversion of Rotary to Roundabout:
Kingston, NY
Photo:NewYorkStateDOT
225 feet
600+ feet

16. Why a roundabout?

17. Roundabouts reduce crashes
 Over 90% reduction in fatalities
 76% reduction in injuries
 35% reduction in total crashes
* NCHRP Report 572
Photo:LeeRodegerdts

18. Safety Performance (NCHRP Report 572)
 78% reduction in injuries
 48% reduction in total crashes
CONVERTED TO

19. ALTERNATIVES
ANALYSIS

20. How does a roundabout compare to a signal?
Year 2035 Operations – Average Delay per Vehicle
> 80s
~ 26s
~ 22s
OR126/Tom McCall
Vehicle stacking
Queues are approximately half as
long with roundabout vs. signal

21. How does a roundabout compare to a signal?
Future Safety Performance over 5 Years
6.5 Crashes
3.5 Fatal/Injury
3.5 Crashes
1.5 Crashes
0.5 Fatal/Injury
74% reduction
89% reduction
OR126/Tom McCall
44% reduction

22. Roundabout Concept

23. Signal Concept

24. Freight Accommodation

25. Freight Accommodation
 1,552 single-use permits on OR126 (2007-2012)
 764 single-use permits on Millican Road (2013-2014)
 Longest combination truck-trailer = 267 feet
 Widest load = 23.5 feet
 Over 12 loads = Height > 18 feet

26. Designing for Freight – US20/Barclay Example
 Full-scale test in two
locations
 Tested 18 truck/trailer
combinations
– Up to 130’ in length
 All test vehicles made it
through the roundabout

28. Questions?

29. What is a modern roundabout?
 YIELD control on entry
– Priority to circulating
vehicles
 Slow, consistent speeds
 Landscaping
 Pedestrian access &
crossing
 No Parking
 Direction of circulation
– Channelization

30. 32 conflict points
High-speed
Angle Crashes
High Impact
8 conflict points
Low-speed
Non-angle Crashes
Low Impact
Vehicle Conflict Points: REDUCED

31. Pedestrian Conflict Points: REDUCED
16 conflict points 8 conflict points

32. Lower speed is safer for pedestrians
Chance of pedestrian
death increases with
vehicle speed

33. Roundabouts and Bicyclists
 Roundabouts slow vehicles to speeds
compatible with bicycles
 Bicyclists have wide range of skills and
comfort levels in mixed traffic
– Experienced cyclists (e.g., commuter or utility
cyclists)
– Inexperienced cyclists (e.g., children or
occasional recreation cyclists)
 Give bicyclists option of either being
vehicle or pedestrian

34. Pedestrian Safety
 Netherlands (181 Intersections converted to roundabouts)
– 73% reduction in pedestrian crashes
– 89% reduction in pedestrian injury crashes
 Norway (4 years of data)
– 59 roundabouts = 1 pedestrian injury crash out of 33 injury crashes (3%)
– 124 signals = 57 pedestrian injury crashes out of 287 injury crashes (20%)
 NCHRP Report 572
– 769 observed pedestrian events
• No crashes
• Four conflicts (0.5%)

35. Cyclist Safety
 NCHRP Report 572
– 690 observed bicyclist events
• No crashes
• Four conflicts (0.6%)

36. Public perception of roundabouts

37. Signalized Intersection Crashes in Oregon
2003 - 2007 (5 yrs)
 At 1,240 Signalized Intersections on State Highways
– 32 Fatal crashes
– 308 Serious Injury crashes
– 5,171 Moderate & minor injury crashes

38. Future (Year 235) Intersection Operations – Signal
Scenario #1 - No Airport Way/Millican
Road Reroute
Scenario #2 – With Airport Way/Millican
Road Reroute

39. Future Intersection Operations – Roundabout
2035 Design Year
(Volume Scenario #1 - no Airport Way/
Millican Road Reroute)
2035 Design Year
(Volume Scenario #2 - with Airport Way/
Millican Road Reroute)
Approach Lane Configurations
Volume to
Capacity Ratio1 Delay (sec)1 Lane Configurations
Volume to
Capacity Ratio1 Delay (sec)1
HCM 2010
Eastbound LT, TR 0.50 10.5 LTR 0.90 33.7
Westbound LTR 0.70 15.5 LTR 0.84 26.8
Northbound LTR 0.55 20.0 LT,R 0.68 31.3
Southbound LTR 0.41 13.8 LTR 0.52 18.7
HCM 2010 (with City of Bend Calibration)
Eastbound LTR 0.77 16.9 LTR 0.72 15.2
Westbound LTR 0.57 10.0 LTR 0.68 14.0
Northbound LTR 0.50 16.6 LTR 0.71 24.7
Southbound LTR 0.29 8.4 LTR 0.36 10.3
1 Reported for the critical lane for multilane approaches
LTR = Single lane approach; LT,TR = Left/through and Through/right lanes; LT,R = Left/through and right lanes

40. Summary Intersection Operations
2035 P.M. Peak Hour
No-Build Signal
Roundabout
(HCM 2010)
Roundabout
(City of Bend
Calibration)
95th Percentile Queue (ft)
Eastbound OR 126 25 650 325 175
Westbound OR 126 25 500 275 150
Northbound Tom McCall Rd >500 100 125 150
Southbound Tom McCall Rd >500 125 75 50
Approach Capacity (v/c)
Eastbound OR 126 0.02 0.78 0.90 0.72
Westbound OR 126 0.04 0.69 0.84 0.68
Northbound Tom McCall Rd >1.0 0.58 0.68 0.71
Southbound Tom McCall Rd >1.0 0.65 0.52 0.36
Approach Delay (s)
Overall Intersection >80 25.9 28.3 16.0
Eastbound OR 126 0.5 22.7 33.7 15.2
Westbound OR 126 1.1 16.8 26.8 14.0
Northbound Tom McCall Rd >80 40.4 31.3 24.7
Southbound Tom McCall Rd >80 36.6 18.7 10.3
Level of Service (LOS)
Overall Intersection F C D C
Eastbound OR 126 A C D C
Westbound OR 126 A B D B
Northbound Tom McCall Rd F D D C
Southbound Tom McCall Rd F D C B

43. Scenario
Total Entering
Volume
OR126/Tom McCall
Existing 1,210
2018 1,355
2035 1,915
Brookswood/Bond/Reed Market
May 2014
Counts
2,476

44. US 50/US 77 – Florence, KS
Steve King - KDOT
20% Trucks
40% Trucks
40% Trucks

46. Bypass for Overdimensional Loads