Description:
An automatic or manually motivated, traffic-calming device, which provides non-impeding and impeding conditions on demand. Multiple means of initiating action of the unit provide a wide variety of applications for the retractable speed bump.
A warning device wherein the raising and lowering of the retractile may be positively regulated and controlled by manual, or remote multiple signals, generated in accordance to existing automobile traffic conditions.

The Retractable Speed Bump, wherein a retractile consisting of bi-folding hinged plates, which are elevated to present a visible obstruction to motor vehicles, and a position restraining device, operated by linear and rotary motor drive means, by on/off push button switching, or through a series of Programmable Logic Controllers, commanded by way of analog or digital signals emanating from permanently mounted or vehicular mounted speed detecting devices.

The device is adaptable to manually hand cranking and locking operations.

Advantages:

The device permits vehicles traveling within the speed limits to proceed without experiencing the jolt produced by a speed bump. Provides positive drainage, street sweeping, snow removal, heat tracing and remote location interoperability are pertinent inclusions to the specifications and claims.

Reduces or prevents personal injuries and damage to motor vehicles from continuously deployed speed bumps. Minimizes the response times of Emergency and Law Enforcement vehicles.

Reduces the emission of partially combusted gas due to sudden vehicle deceleration and acceleration before and after negotiating fixed speed bumps and humps.

Warns motorists of their impending approach to controlled or multi-speed limit zones

Provides authorized vehicles such as passenger buses, school buses and emergency vehicles the unobstructed passage over an otherwise raised speed bump.
Provides an “On-demand” means of traffic calming only when and where required.