![]() ![]() This Resource Hub is intended to identify current design guidance and practices related to the use of bicycle signals and provide information on applications in communities throughout the United States, Canada, and internationally. The Bicycle Signals Resource Hub is an interactive webpage to assist transportation professionals in the planning, design, and operation of bicycle traffic signals. Green bicycle signal face in Seattle, Washington, USA. Detection at signals shall be placed where bicyclists wait, either in the center of a bike box or immediately behind the stop bar in the bike lane.Figure 1. If leading signal detection is provided, it shall be located along a bike lane or in the outside travel lane. Detection shall be located where bicycles are intended to travel and/or wait. On streets with bike lanes or bikeable shoulders, bicycle detectors shall be located in the bike lane or shoulder. If used, push buttons should have a supplemental sign facing the bicyclist’s approach to increase visibility. If provided, push-button activation shall be located so bicyclists can activate the signal without dismounting. If not provided within a dedicated bike lane, shoulder, or cycle track, bicycle signal detection shall be visible to bicyclists through signs and/or stencils so that bicyclists know that the intersection has detection and where to position their bicycle to activate the signal. Square and unmodified circle detectors are most sensitive at their edge (left). The sensitivity of standard video and in-pavement loop detectors shall be adjusted to ensure that they detect bicyclists.ĭue to magnetic field symmetry, the center of inductive loops is the most sensitive location for detection for both diagonal slashed detectors and quadrupole loop detectors (above left). ![]() At clearly marked locations to designate where a bicyclist should wait.Advanced bicyclist detection can be applied to extend the green phase or to call the signal. ![]() To increase the green signal phase on intersection approaches whose combined minimum green plus yellow plus all-red is insufficient for bicyclists to clear the intersection when starting on a green signal.In left turn lanes with actuated left-turn signals where bicyclists may also turn left.In bike lanes on intersection approaches that are actuated.At intersections with bicycle signal heads and/or bicycle-specific phasing that are actuated.In the travel lane on intersection approaches without bike lanes where actuation is required.Can be used to prolong the green phase to provide adequate time for bicyclists to clear the intersection.Discourages red light running by bicyclists without causing excessive delay to motorists.Increases convenience and safety of bicycling and helps establish bicycling as a legitimate mode of transportation on streets.Improves efficiency and reduces delay for bicycle travel.Microwave – Miniature microwave radar that picks up non-background targetsĬlick on the images below to view 3D concepts of signal detection configurations.Push-button – User-activated button mounted on a pole facing the street. ![]() Video – Video detection aimed at bicyclist approaches and calibrated to detect bicyclists.Loop – Induction loop embedded in the pavement.This section covers four primary types of bicycle signal detection: Proper bicycle detection meets two primary criteria: 1) accurately detects bicyclists and 2) provides clear guidance to bicyclists on how to actuate detection (e.g., what button to push, where to stand). Otherwise, undetected bicyclists must either wait for a vehicle to arrive, dismount and push the pedestrian button (if available), or cross illegally. For bicycles to be detected, the loop must be adjusted for bicycle metallic mass. Inductive loop vehicle detection at many signalized intersections is calibrated to the size or metallic mass of a vehicle. Bicycle detection occurs either through the use of push-buttons or by automated means (e.g., in-pavement loops, video, microwave, etc). Bicycle detection is used at actuated signals to alert the signal controller of bicycle crossing demand on a particular approach. ![]()
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