INTERSECTION DESIGN 4-1
Intersections Avoid unusual conflicts Provide direct path for cyclists, close to that of motor vehicles Bicyclists should be visible; their movements should be predictable Simple right angles best for bicyclists 4-2
Bigger isn t always better Albuquerque NM 4-3
Albuquerque NM 4-4
Albuquerque NM 4-5
Compact urban intersections are better Philadelphia PA 4-6
Skew decreases driver s ability to see cyclists 4-7
Right angle increases visibility 4-8
Shallow angle/poor visibility not good for cyclists Honolulu HI 4-9
Driver relies on rear-view mirror to see traffic Honolulu HI 4-10
Bicycle Detection at Signals This figure indicates where cyclists should wait in order to actuate the signal 5-11
Loop detector in bike lane detects cyclists 4-12
MUTCD standard for signal loop marking for bicyclists (Section 9C.05) 5-13
Loop detector in travel lane with cyclist stencil Portland OR 4-14
Good advice: Lean for the green 4-15
Not good: Requires dismounting Better: Push button close to curb What about ped-style push buttons for cyclists? 4-16
Summary of provisions for bicyclists at signals 4-17
Bike lane & right-turn lane channelization Always place bike lane to left of RTL to Separate conflicts Make bicyclists movements more predictable Take advantage of speed difference 4-18
Corvallis OR 4-19
Other scenario 1. RTL created by dropping parking 4-20
Corvallis OR 4-21
Corvallis OR 4-22
Corvallis OR 4-23
Other scenario 2. RTL created by dropping through lane In this case, bicyclists must move over across a lane to reach through bike lane 4-24
Bicyclists must cross a lane to reach through bike lane Portland OR 4-25
Bicyclists must cross a lane to reach through bike lane Portland OR 4-26
Portland OR 4-27
Place bike lane correctly even if it ends past intersection 4-28
A combined right turn lane and through bike lane is a reasonable compromise in constrained conditions Salem OR 4-29
Shared lane markings may ultimately be a better solution Cars will use the bike lane area when bicyclists are not there note the customized sign 4-30
Roundabouts: Making them work for bicyclists 4-31
A roundabout is a type of intersection control Clearwater FL 4-32
A roundabout is not: 1. A New England style rotary, with large size & high speeds Augusta ME 4-33
A roundabout is not: 2. A Washington DC style circle, with traffic signal controls Washington DC 4-34
A roundabout is not: 3. A traffic-calming mini circle Portland OR 4-35
A roundabout is not: 4. Paris Paris FR 4-36
Why roundabouts are safer for all users: Slow speed: Deflection, truck apron, splitter islands, reverse super Reduced conflicts No left turns Yield on entry CRF (all users): About 54% overall 27% pedestrian crashes Up to 76% fatals and serious injuries Clearwater FL 4-37
Essential roundabout characteristics Separated sidewalks direct peds to crosswalks Splitter island Slow speed exit Truck apron Crosswalk 1 car length back Lots of deflection = slow speeds throughout Slow speed entry = yield Bend OR 4-38
What does it take to make roundabouts work for bicyclists? Slow speeds lots of deflection; truck apron Simple, single lane, throughout Splitter islands Escape ramps for multi-lane roundabouts 4-39
Roundabouts: Designing to accommodate Bicyclists 4-40
End bike lane to encourage cyclist to enter roadway Bend OR 4-41
End bike lane to encourage cyclist to enter roadway Bend OR 4-42
Bend OR Slow speed allows cyclists to share roadway 4-43
Bend OR 4-44
Bend OR 4-45
Bend OR 4-46
Bend OR 4-47
What if a cyclist doesn t want to enter the roundabout? Bend OR 4-48
Bend OR 4-49
Bend OR 4-50
Questions? 4-51