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Sharrows in the MUTCD
Sharrows are simply shared lane markings. They raise bike awareness among drivers and assist bicyclists with lane positioning, avoiding the "dooring zone," and riding in the right direction (with traffic). The city just completed the sharrow installation on Joseph E Lowery Boulevard in the West End - check them out!
Here's the guidance from the 2009 MUTCD in case you were wondering:
Section 9C.07 Shared Lane Marking
01 The Shared Lane Marking shown in Figure 9C-9 may be used to:
Figure 9C-9 Shared Lane Marking
Thumbnail image of Figure 9C-9
1. Assist bicyclists with lateral positioning in a shared lane with on-street parallel parking in order to reduce the chance of a bicyclist's impacting the open door of a parked vehicle,
2. Assist bicyclists with lateral positioning in lanes that are too narrow for a motor vehicle and a bicycle to travel side by side within the same traffic lane,
3. Alert road users of the lateral location bicyclists are likely to occupy within the traveled way,
4. Encourage safe passing of bicyclists by motorists, and
5. Reduce the incidence of wrong-way bicycling.
02 The Shared Lane Marking should not be placed on roadways that have a speed limit above 35 mph.
03 Shared Lane Markings shall not be used on shoulders or in designated bicycle lanes.
04 If used in a shared lane with on-street parallel parking, Shared Lane Markings should be placed so that the centers of the markings are at least 11 feet from the face of the curb, or from the edge of the pavement where there is no curb.
05 If used on a street without on-street parking that has an outside travel lane that is less than 14 feet wide, the centers of the Shared Lane Markings should be at least 4 feet from the face of the curb, or from the edge of the pavement where there is no curb.
06 If used, the Shared Lane Marking should be placed immediately after an intersection and spaced at intervals not greater than 250 feet thereafter.
07 Section 9B.06 describes a Bicycles May Use Full Lane sign that may be used in addition to or instead of the Shared Lane Marking to inform road users that bicyclists might occupy the travel lane.