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E-mail| 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.
