Traffic Safety Devices

Angled Crosswalk

Angled Crosswalks

Angled Crosswalks provide a center refuge for people who are walking. This forces pedestrians to look at oncoming traffic before crossing entire roadway.

Back in Diagonal


Back-In Diagonal Parking

Back-in diagonal parking allows drivers to back into an angled parking space, resulting in safer access to sidewalks and better visibility while exiting the space.

bikebox_street

Bike Boxes

A bike box is a bike staging area designed to prevent bike/car collisions at intersections. It allows bikers to wait in front of motorists at a red light to make them more visible and prevent collisions caused by a motorist turning across the path of a cyclists traveling straight. See video.

Bike Traffic SignalBike Traffic Signal

A bike traffic signal aids the safe and efficient movement of bicycles through intersections that serve high volumes of bicycle and motor vehicle traffic by giving both types of users a separate signal phase to travel through the intersection.

See video.

Chicane

Chicanes

A chicane is a street designed to slow traffic by requiring motorists to follow a one-lane serpentine route. Typically, a chicane uses three or more horizontal deflections on alternating sides of the street. The design slows traffic and elicits a cautious response from motorists. Chicanes reduces vehicle speeds, eliminates straight site line, and have a potential to add more landscaping to a street.

Chicane Pinchpoint

Chokers

Chokers slow vehicles at a mid-point along the street and they create a clear transition between a commercial and a residential area. Chokers narrow overly wide intersections and midblock areas of streets and add room along the sidewalk or planting strip for landscaping or street furniture.

medianrefugeisland_regular_streetCrossing Islands

Crossing Islands enhance pedestrian crossings, particularly at unsignalized crossing points, reduce vehicle speeds approaching pedestrian crossings and highlight pedestrian crossings.

curb-extensionCurb Extensions

Curb extensions improve safety for pedestrians and motorists at intersections and increase visibility and reduce speed of turning vehicles. They also encourage pedestrians to cross at designated locations, prevent motor vehicles from parking at corners, and shorten crossing distance and reduce pedestrian exposure.

Green Bike Lane

Green Bike Lane

Green bike lanes use green-colored pavement to increase the visibility of the bicycle lane in places where there is potential for conflict with motor vehicles. See video.

HAWKPedestrian-Activated Red Light

A Pedestrian-Activated Red Light, or pedestrian hybrid beacon (PHB), is a traffic control device to help people who walk and bike to cross busy streets safely. See video.

13th_Alder Sketch

Protected Bike Lane

These are bike lanes that physically separate people biking from people driving. This separation can be achieved with barriers, differences in grade and on-street parking. Protected bike lanes greatly enhance both the perception and reality of bike safety. By providing a safer rider experience, these lanes have been shown to increase the number of people cycling and therefore improve overall safety.

Protected IntersectionProtected Intersection

Modeled after Dutch intersection design, the Protected Intersection brings the physical protection along with you as you ride through the crossing. A collection of design elements makes left turns simple and secure, right turns protected and fast, and provides straight through movements that minimize or eliminate conflicts from turning cars.

Mid-block Raise Crosswalk

Raised Crosswalk

A raise crosswalk is a flat-topped speed table built as a pedestrian crossing. It may be constructed of asphalt, concrete or a combination of different materials. Raised crosswalks reduce vehicle speeds, raise driver and pedestrian awareness of the crossing location, and enhance pedestrian environment.

Kesey Raised

Raised Intersection

Raised intersections are flat raised areas covering an entire intersection. They are often built as a pedestrian crossing to slow vehicle traffic. Raised Intersections reduce vehicle speeds, enhance the pedestrian environment, and improves vehicle and pedestrian safety.

Ithaca Sharrow photo

Sharrow
Shared lane markings, or sharrows, identify where bicyclists should position themselves within the travel lane. Where sharrows are present, bicycles and cars share the lane. See video.

Speed Hump

Speed Humps
Speed humps are raised areas of asphalt designed to reduce vehicle speeds. Speed humps are typically 14 feet long and 3 inches high. Speed humps help by reducing vehicle speeds and enhancing the pedestrian environment at pedestrian crossings.

speed-tableSpeed Table

A speed table is a flat-topped speed hump often constructed with brick or other textured materials on the flat section. They slow vehicle traffic approaching the table to enhance the pedestrian environment. The wheelbase of a typical passenger car will fit on top of a speed table. Speed tables reduce vehicle speeds, enhance the pedestrian environment at pedestrian crossings.

Stutter Flash

Stutter Flash

A stutter flash increases driver awareness of potential pedestrian/vehicle conflicts at mid-block pedestrian crossings and intersections without traffic signals. Cars should stop when the signal is flashing and allow the pedestrian to cross. See video.

mini-roundabout-1Traffic Circle

A traffic circle is a raised island placed in the middle of an intersection to calm traffic. Motorists are required to slow to a speed that allows them to comfortably maneuver around the circle. Traffic circles manage traffic at intersections where volumes do not warrant a stop sign or a signal. They also reduce crash occurrence at the intersection of two local streets, and reduce vehicle speeds at the intersection.