Elements of Sustainable Transportation
Bikeways- Intersection
Design
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Elements of Sustainable Transportation |
Bikeways- Intersection
Design
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How cycle facilities are handled at intersections is a critical design element. There are at least three alternatives to the American standard of merging into the left lane with cars: 2 stage, roundabout, and bikebox. |
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With
the 2-stage model, cyclists make a left turn like a pedestrian would-
cross straight ahead, turn left, and wait for the green light. This option
might take more time, but it is a viable alternative to the 'naked' merging
used with bike lanes. One change to this picture would be the removal
of some of the parked cars next to the intersection- to provide better
visibility
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| A second type of intersection for accommodating a left-turning cyclist is the roundabout. Follow the 'green trail' to see how a cyclist would make a left turn. click here to go to the category Roundabouts |
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A= standard
model |
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This brings up another cycling facility concept: placing the cyclist's stop bar (the white waiting line) several feet ahead of the car's stop bar. The advantages include the cyclist getting a head start at the green, the cyclist being more visible, and the cyclist not having to breathe as much auto exhaust while waiting at a red light. Source: Dutch Cycling Manual 'CROW'. |
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| Here, a cycle track is colored as it moves through the intersection. The Danish Cycling Federation successfully lobbied the decision makers to implement this type of treatment. Notice how far back the white car on the right is- a function of stop light placement and stop bar placement. |
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