A traffic control device, for use with a roadway receiving vehicles travelling longitudinally along the roadway, includes a housing mounted transversely across the roadway with an upper supporting surface that supports the vehicles rolling over the housing. A frame comprised of a shaft supporting tire puncturing members thereon is rotatable within the housing between stored and working positions of the tire puncturing members relative to the upper supporting surface of the housing. Offset counterweights are coupled to the frame to bias the tire puncture members towards the working position. An upper stop member on the housing, formed of resilient material, is engaged by the frame in the working position and is adjustable in height to control position of the tire puncturing members in the working position.

A traffic control device, for use with a roadway receiving vehicles travelling longitudinally along the roadway, includes a housing mounted transversely across the roadway with an upper supporting surface that supports the vehicles rolling over the housing. A frame comprised of a shaft supporting tire puncturing members thereon is rotatable within the housing between stored and working positions of the tire puncturing members relative to the upper supporting surface of the housing. Offset counterweights are coupled to the frame to bias the tire puncture members towards the working position. An upper stop member on the housing, formed of resilient material, is engaged by the frame in the working position and is adjustable in height to control position of the tire puncturing members in the working position.

A traffic control device, for use with a roadway receiving vehicles travelling longitudinally along the roadway, includes a housing mounted transversely across the roadway with an upper supporting surface that supports the vehicles rolling over the housing. A tire puncturing frame comprised of a shaft supporting tire puncturing members thereon is rotatable within the housing between stored and working positions of the tire puncturing members relative to the upper supporting surface of the housing. Offset counterweights are coupled to the frame to bias the tire puncture members towards the working position. A latch bolt threaded into a threaded aperture in the housing selectively retains the tire puncturing frame in the stored position.

A vehicle barrier system and method that prevents tailgating. The system may include a control system in communication with a sensor system for detecting a vehicle seeking passage through a gateway, as well as a first and second gate system. The control system receives data from the sensor system indicating the presence of the vehicle and, in response, determines whether the second gate system is closed. When the second gate is determined to be closed, the control system opens the first gate system to allow the vehicle to pass the first gate system and attempts to close the first gate system behind the vehicle after the vehicle passes the first gate system. In response to successfully closing the first gate system behind the vehicle, the second gate system is opened to allow the vehicle to proceed through the gateway. Otherwise, an alarm is sounded.

A vehicle barrier system and method that prevents tailgating. The system may include a control system in communication with a sensor system for detecting a vehicle seeking passage through a gateway, as well as a first and second gate system. The control system receives data from the sensor system indicating the presence of the vehicle and, in response, determines whether the second gate system is closed. When the second gate is determined to be closed, the control system opens the first gate system to allow the vehicle to pass the first gate system and attempts to close the first gate system behind the vehicle after the vehicle passes the first gate system. In response to successfully closing the first gate system behind the vehicle, the second gate system is opened to allow the vehicle to proceed through the gateway. Otherwise, an alarm is sounded.

A processor-implemented method and/or computer program product selectively blocks a self-driving vehicle's access to a roadway. A vehicle interrogation hardware device receives an autonomous capability signal from an approaching self-driving vehicle. One or more processors compare the predefined roadway conditions to current roadway conditions of the access-controlled roadway. In response to the predefined roadway conditions matching the current roadway conditions of the access-controlled roadway within a predetermined range, the processor(s) determine whether the level of autonomous capability of the approaching self-driving vehicle is adequate to safely maneuver the approaching self-driving vehicle through the current roadway conditions of the access-controlled roadway. In response determining that the level of autonomous capability of the self-driving vehicle is not adequate to safely maneuver the approaching self-driving vehicle through the current roadway conditions of the access-controlled roadway, an automatic barricade controlling device positions an automatic barricade to block the approaching self-driving vehicle from accessing the access-controlled roadway.

A processor-implemented method and/or computer program product selectively blocks a self-driving vehicle's access to a roadway. A vehicle interrogation hardware device receives an autonomous capability signal from an approaching self-driving vehicle. One or more processors compare the predefined roadway conditions to current roadway conditions of the access-controlled roadway. In response to the predefined roadway conditions matching the current roadway conditions of the access-controlled roadway within a predetermined range, the processor(s) determine whether the level of autonomous capability of the approaching self-driving vehicle is adequate to safely maneuver the approaching self-driving vehicle through the current roadway conditions of the access-controlled roadway. In response determining that the level of autonomous capability of the self-driving vehicle is not adequate to safely maneuver the approaching self-driving vehicle through the current roadway conditions of the access-controlled roadway, an automatic barricade controlling device positions an automatic barricade to block the approaching self-driving vehicle from accessing the access-controlled roadway.

A vehicle barrier system and method that prevents tailgating is provided. The system may include a control system in communication with a sensor system for detecting a vehicle seeking passage through a gateway, as well as a first and second gate system. The control system receives data from the sensor system indicating the presence of the vehicle and, in response, determines whether the second gate system is closed. When the second gate is determined to be closed, the control system opens the first gate system to allow the vehicle to pass the first gate system and attempts to close the first gate system behind the vehicle after the vehicle passes the first gate system. In response to successfully closing the first gate system behind the vehicle, the second gate system is opened to allow the vehicle to proceed through the gateway. Otherwise, an alarm is sounded.

A vehicle barrier system and method that prevents tailgating is provided. The system may include a control system in communication with a sensor system for detecting a vehicle seeking passage through a gateway, as well as a first and second gate system. The control system receives data from the sensor system indicating the presence of the vehicle and, in response, determines whether the second gate system is closed. When the second gate is determined to be closed, the control system opens the first gate system to allow the vehicle to pass the first gate system and attempts to close the first gate system behind the vehicle after the vehicle passes the first gate system. In response to successfully closing the first gate system behind the vehicle, the second gate system is opened to allow the vehicle to proceed through the gateway. Otherwise, an alarm is sounded.

A vehicle barrier system that prevents tailgating. The system may include a control system in communication with a sensor system for detecting a vehicle seeking passage through a gateway, as well as a first and second gate system. The control system receives data from the sensor system indicating the presence of the vehicle and, in response, determines whether the second gate system is closed. When the second gate is determined to be closed, the control system opens the first gate system to allow the vehicle to pass the first gate system and attempts to close the first gate system behind the vehicle after the vehicle passes the first gate system. In response to successfully closing the first gate system behind the vehicle, the second gate system is opened to allow the vehicle to proceed through the gateway. Otherwise, an alarm is sounded.