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Montclair Township

Traffic Calming Devices Summary
Calming Device Device Description Pros Cons Available for Use
Lane/Shoulder striping (traffic markings) Traffic striping along the edge line of a street, which narrows the travel lanes at that location. • Easy to implement
• Low cost
• None On any street.
Rumble Strips A series of raised transverse stripes (traffic markings) • Easy to implement
• Low cost
• Create noise
• Unpopular with residents
On any street. Note: these devices are primarily used on highways, not on residential streets.
Bump-out (also known as Bulb-out or Choker Curb extensions at mid-block or intersection corners that out or Choker) narrow a street by extending
the sidewalk or widening the planting strip.
• Somewhat effective for slowing traffic
• Relatively inexpensive
• Create difficulties for snow plowing
• Require municipality to take over snow plowing when used on County roads
On any street.
Speed Bump Short raised area of pavement, typically 3 to 4 inches high and 8 to 12 inches wide. • Very effective for slowing traffic
• Inexpensive
• Unsafe at even moderate speeds
• Create problems for maintenance vehicles (snow plowing, street cleaning, etc.)
These devices can not be used on public streets. They are typically used in parking lots and private drives to maintain very low speeds.
Speed Hump Rounded raised areas of pavement typically 12 to 14 feet in length; normally installed in a series. • Effective for reducing speed
• Relatively inexpensive
• Increased emergency response times
• Create problems for maintenance vehicles (snow plowing, street cleaning, etc.)
Only on local streets in exceptional circumstance as described hereinafter; will not be considered for primary emergency response routes.
Speed Table Long raised humps with a flat section in the middle, and ramps on the ends; sometimes constructed with brick or other textured materials on the flat section. • Effective for reducing speed
• Relatively inexpensive
• Increased emergency response times
• Create problems for maintenance vehicles (snow plowing, street cleaning, etc.)
On local and County streets in exceptional circumstances as described hereinafter; will not be considered for primary emergency response routes.
Raised Intersection Flat raised areas covering entire intersections, with ramps on Intersections all approaches, and often with brick or other textured material on the flat section and ramps. • Effective for reducing speed
• Very expensive
• Increased emergency response times
• Create problems for maintenance vehicles (snow plowing, street cleaning, etc.)
Only on local streets in exceptional circumstance as described hereinafter; will not be considered for primary emergency response routes.
Closure Full or partial closures of a street; typically done only after other measures have failed or been determined inappropriate. • Effective for reducing cut-through traffic
• Relatively inexpensive
• May require re-routing of collection services (leaf, refuse and recycling) Only on local streets, after other measures have been determined to be ineffective; NJDOT approval is required.

NOTE: Other types of traffic calming devices may be approved in the case of exceptional circumstances, following evaluation of measures on the preceding list and a conclusion that such measures would be ineffective or objectionable.