Left Turn Queue Box and Bike Lane Door Zone Hatching Performance 6612 Singletree Drive Columbus, Ohio 43229 614.656.2424 www.cmtran.com
Columbus, Ohio Installations Turn Box
Columbus, Ohio Installations Turn Box
Columbus, Ohio Hatch
What is a Two-Stage Left Turn Queue Box?
How to Use a Turn Queue Box Right Turn on Red restrictions at select intersections
Transverse Markings Evaluation Provides a barrier between cyclists and parked vehicles Encroaching cyclists and length of encroachment was evaluated
Right Turn on Red Compliance Evaluation of driver compliance with right turn on red restrictions Evaluated driver performance on approaches with turn queue boxes present Each study intersection had different type of restriction Spring & Elijah Pierce No RTOR When Bike Present Spring & Lester No RTOR Except Curb Lane Spring & Grant No RTOR Images from Google Street View
Data Collection 6 Collection Periods 24 hours of video per intersection Collection Schedule 1: Before Installation 2: Immediately After Installation 3: One Month After Installation 4: Three Months After Installation 5: Nine Months After Installation 6: Twelve Months After Installation Installation Delays Schedule Changes
Data Collection
Evaluation Conflict Rates Compliance Rates Right Turn on Red Compliance Transverse Markings Evaluation Noted Observations Many Iterations of Analysis
Number of Cyclists Counted in 24 Hours on Turn Queue Box Approaches Collection Total Cyclists Counted on all Intersection Approaches with a Turn Queue Box Highest Volume Lowest Volume Median of all Counts Average of all Counts Collection 1 1,275 122 10 48 60 Collection 2 1,612 119 4 54 56 Collection 3 1,879 142 4 68 69 Collection 4 2,551 263 12 100 116 Collection 5 2,512 313 15 72 114 Collection 6 1,224 458 8 57 121
Results & Trends
Results & Trends
Results & Trends
Results & Trends
Results & Trends
Right Turn on Red Compliance Spring & Elijah Pierce No RTOR When Bike Present Spring & Lester No RTOR Except Curb Lane Spring & Grant No RTOR
Anecdotal Observations for Turn Queue Box Evaluation Better Turn Box usage takes place Downtown rather than north OSU Campus area Joggers use bike lanes Most conflict comes from cyclists using sidewalk & quickly changing lanes in roadway Very minimal conflicts with actual use of turn queue boxes Cyclists take fastest path from A to B Seattle, WA
Transverse Markings Evaluation Transverse Markings Cyclist Count Data
Transverse Markings Evaluation Transverse Markings Encroachers & Lengths of Encroachment
General Results Turn Queue Box Evaluation Overall Compliance 73.8% Overall Conflict 2.1% Turn Box Approach Compliance 85.4% Turn Box Approach Conflict 1.2% 4.3% of total cyclists made turn queue box movement Of the 4.3% above, 21.6% of those cyclists utilized the turn queue box RTOR Compliance Overall Right Turn on Red Compliance 97.0% Transverse Marking Evaluation 13.6% of all cyclists encroached Encroachment occurred for average of 40.8% of observable length
Conclusions Low Turn Queue Box Utilization Initial dip in utilization but then trend is up Low total vehicle volumes at intersections Comfort level Additional time Sidewalks/Crosswalks Utilization likely to increase as Columbus traffic volumes grow N. 4 th Street & E. Long Street Columbus, OH
Conclusions Positive Turn Box Impacts Reduction in Conflicts on turn box approaches Trending towards even less conflicts Increase in compliance on turn box approaches No noticeable issues with driver behavior Compliance trending upward Sidewalk use trending down Effects of bike lanes + turn queue boxes
Conclusions Transverse Markings Benefit Number of cyclists encroaching in hatch trending down Right turn on Red compliance Good and trending upward Limited data
Recommendations Turn Queue Box education for drivers and cyclists Further evaluation as Columbus traffic volumes continue to grow
What could we have done differently? Evaluation of weather/time of year on results Evaluation of bike lane installation prior to turn queue box installation
QUESTIONS?