Interim Approval for Optional Use of an Intersection Bicycle Box (IA-18) Attachment 2 Long Description

This figure shows an example of an intersection bicycle box installed at the front of a multi-lane approach to an intersection. For purposes of this description, it is assumed that north is upward in the figure.

The northbound approach is comprised of a left-turn lane, a shared through-right lane, and a bicycle lane. There is an intersection bicycle box placed at the front of the approach that spans across the entire northbound approach. All approaches to the intersection have marked crosswalks.

A sign assembly consisting of a STOP HERE ON RED (R10-6a) sign with an EXCEPT BICYCLES (R3-7bP) plaque is placed where northbound traffic would first encounter the bicycle box. A dimension placed to the right of the bicycle box indicates that the depth of the box perpendicular to the cross street is a minimum of 10 feet. NO TURN ON RED (R10-11a) signs are placed on the northeast and southeast corners of the intersection facing the northbound approach. An asterisk next to the R10-11a sign refers to a note that states these signs are placed in accordance with Section 2B.54 of the MUTCD.

Pedestrian Signals with Countdown Displays are shown on either side of the crosswalk across the northbound approach. A note indicates that Countdown Displays are required where a bicycle box crosses more than one lane.

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