"Traffic Calming Device" is one or more of the following described activities or improvements installed to regulate, warn or guide traffic placed on, over, or adjacent to a street, highway, private road open to public travel, pedestrian facility, or shared-use path by authority of a public agency or official having jurisdiction, or, in the case of a private road open to public travel, by authority of the private owner or private official having jurisdiction.
(a) "Driver Feedback Sign" is an electric sign with accompanying radar that displays the speed of the approaching vehicle. At a predetermined speed, the display will indicate "slow now" or another appropriate message indicating that the approaching motorist should reduce speed.
(b) "Prohibitive Signage" prohibits certain activities and vehicles on the roadway, such as one-way signs, turn restrictions, and truck prohibition signs. Their installation results in the elimination of certain traffic movements while maintaining emergency vehicle access. This does not include the installation of stop signs.
(c) "Lane Narrowing through Painting and Pavement Markings" narrows existing roadway travel lanes using paint for centerlines, edge lines, hashed islands, or extending curbs.
(d) "Speed Hump" are gradual changes in the roadway surface that have little effect on drivers traveling the speed limit, but produce discomfort to the passengers at excessive speeds. They range in length from ten to twenty feet, and are generally three to four inches in height. The profile of a speed hump tends to be circular or parabolic, and they are generally tapered at each end to allow for road drainage.
(e) "Speed Lumps" is a variation of a speed hump, it incorporates grooved channels to accommodate the wheel base of emergency response vehicles. Speed lumps may be constructed permanently of asphalt in a similar manner to speed humps.
(f) "Center Island Narrowing" is a technique by which a raised island is created in the center of the roadway narrowing the travel lanes. Center islands are often landscaped to provide a visual upgrade to the neighborhood.
(g) "Chokers" are curb extensions at midblock locations that narrow a street by widening the sidewalk or creating planting strip. If marked as crosswalks, they are also known as safe crossings. Two-lane chokers leave the street cross section with two lanes that are narrower than the normal cross section. One-lane chokers narrow the width to allow travel in only one direction at a time, operating similarly to one-lane bridges.
(h) "Traffic Circles" are raised islands placed within an intersection designed to provide one way circular flow through the intersection.
(Ord. 16-O-62. Passed 7-5-16.)