Anderson, Kent

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1Kent  Anderson 2010 Road SchoolBike Lane StripingThe devil is in the details2Kent  Anderson 2010 Road SchoolBike lane stripingOutline• Where are we at?• Where are we going?• Bike lane characteristics• Current guidance• Recommendations and examples3Kent  Anderson 2010 Road SchoolBike lane stripingWhere are we going?• Demand for motor vehicle transportation on a per capita basis has peaked        (per capita VMT as the measure)• Demand for other forms of transportation is growing• Diversification of our transportation system for multiple reasons• A more complicated operating environment for all traffic participantsSignificant growth (percentage) in bicycle infrastructure moving forward4Kent  Anderson 2010 Road SchoolBike lane striping5Kent  Anderson 2010 Road SchoolBike lane stripingCurrent conditions – where are we at?• First streets with bike lanes are currently being implemented in Indiana• A new element in our traffic scheme• A new experience for local drivers and bikers• We will be learning new skills• Crash statistics tell us• Less than 10% of car-bicycle collisions involve overtaking situations• The majority of car-bicycle collisions involve turning movements6Kent  Anderson 2010 Road SchoolBike lane stripingCurrent  guidance – focus not on turning movements• AASHTO Guide to Development of Bicycle Facilities• MUTCD• City of Chicago bike lane striping guide• Davis, CAFocus is on striping between intersections7Kent  Anderson 2010 Road SchoolBike lane stripingBike lane characteristics• Run parallel to, and right of motor vehicle lanes, adjacent to the curb• Separates motor vehicle and cycle traffic• Generally carry traffic moving at different speeds than motor vehicle lanes• Cars are faster during free flow situations in motor vehicle lanes• Cycles are faster when motor vehicle flow is inhibited• Are a thru-lane to the right of a right turn lane• Requires yielding as appropriate to the through movement8Kent  Anderson 2010 Road SchoolBike lane stripingBike lane characteristicsYield9Kent  Anderson 2010 Road SchoolBike lane stripingBike lane characteristicsIn most aspects, no different than a sidewalk with pedestrians.fp =(vx) (w/Sp)3,600fp = pedestrian blockage factorvx = pedestrian flow rateW = lane widthSp = pedestrian walking speed10Kent  Anderson 2010 Road SchoolBike lane stripingCurrent AASHTO & MUTCD guidance – what is missing?Clear signage and markings at conflict points that clarifies right of way issues, expected movements, and behavior of traffic participants, in particular at and through intersections.11Kent  Anderson 2010 Road SchoolBike lane stripingBroad recommendationsProvide clear rules of the road guidance at intersections / conflict points• Striping, signage, signalization (long term)Build upon current MUTCD striping logic• Double line – maximum / special restrictions• Solid line – discourages / prohibits crossing• Broken line – permissive condition• Dotted line – guidanceImplement a hierarchy of striping based upon the hierarchy of traffic participants• Pedestrians• Cyclists• Motor vehiclesGoal: clear perceptibility of  pedestrian / bicycle / vehicle routing through intersections12Kent  Anderson 2010 Road SchoolBike lane stripingSpecific recommendations• Dashing of bike lines in following areas• Through intersections• Commercial curb cuts• Where cyclist must leave bike lane to make left turn movements• Maintenance of solid bike lane line to stop line at signalized intersections• Advanced stop line for cyclists at signalized intersections• Line of sight• No right on red when bikes are present signage• Bike symbol at conflict points of major intersections• Use of bike symbol instead of diamond in bike lanes13Kent  Anderson 2010 Road SchoolBike lane striping14Kent  Anderson 2010 Road SchoolBike lane striping15Kent  Anderson 2010 Road SchoolBike lane striping16Kent  Anderson 2010 Road SchoolBike lane striping17Kent  Anderson 2010 Road SchoolBike lane striping18Kent  Anderson 2010 Road SchoolBike lane striping19Kent  Anderson 2010 Road SchoolBike lane striping20Kent  Anderson 2010 Road SchoolBike lane striping21Kent  Anderson 2010 Road SchoolBike lane striping22Kent  Anderson 2010 Road SchoolBike lane stripingSummary• Where are we going?• Where are we at?• Bike lane characteristics• What is currently missing?• Recommendations and examples

Unique Engineering Challenges of Bicycle Lane Striping

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1648&amp;context=roadschool

Unique Engineering Challenges of Bicycle Lane Striping

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