A system for illuminating a carriageway in a case of fog includes a road safety barrier arranged along the carriageway, at least one fog density detecting device arranged along the road safety barrier, and a plurality of light sources borne by the road safety barrier, distributed along the road safety barrier, and oriented for each to emit a light beam having a direction that is transversal to an extension axis of the road safety barrier so as to illuminate signage on the carriageway. A control unit that is connected to the light sources and to the fog density detecting device is configured to activate the light sources when the fog density detecting device detects a fog density value of above a threshold value.

A reflective pavement marker for a roadway includes a body having a bottom adapted to be secured to the roadway and at least one a reflector on the body. The reflector includes an outer face for receiving light and an inner face comprising a plurality of light reflecting elements for receiving and reflecting the light back through the outer face. The reflector comprises a light transmitting and thermochromatic polymer adapted to transition at a predetermined transition temperature so as to change the color of the light reflected by the reflector depending on the temperature of the polymer. The predetermined transition temperature can be selected so that the color change of the light reflected by the reflector indicates freezing or near freezing road conditions.

A reflective pavement marker for a roadway includes a body having a bottom adapted to be secured to the roadway and at least one a reflector on the body. The reflector includes an outer face for receiving light and an inner face comprising a plurality of light reflecting elements for receiving and reflecting the light back through the outer face. The reflector comprises a light transmitting and thermochromatic polymer adapted to transition at a predetermined transition temperature so as to change the color of the light reflected by the reflector depending on the temperature of the polymer. The predetermined transition temperature can be selected so that the color change of the light reflected by the reflector indicates freezing or near freezing road conditions.

A method for using barrier systems includes positioning a plurality of barrier systems at a location, each barrier system having: a barrier having an interior surface and an opposing exterior surface, the interior surface bounding a chamber that is adapted to receive a ballast; and a light assembly secured to the barrier, the light assembly comprising a housing having a lens that at least partially bounds a compartment, a light source at least partially disposed within the compartment, and programmable circuity in electrical communication with the light emitting device. A control device is used to communicate wirelessly with programmable circuity of each barrier system after the barrier systems are positioned at the location so that data is transferred between the control device and the programmable circuity of each barrier system.

A method for using barrier systems includes positioning a plurality of barrier systems at a location, each barrier system having: a barrier having an interior surface and an opposing exterior surface, the interior surface bounding a chamber that is adapted to receive a ballast; and a light assembly secured to the barrier, the light assembly comprising a housing having a lens that at least partially bounds a compartment, a light source at least partially disposed within the compartment, and programmable circuity in electrical communication with the light emitting device. A control device is used to communicate wirelessly with programmable circuity of each barrier system after the barrier systems are positioned at the location so that data is transferred between the control device and the programmable circuity of each barrier system.

A method, apparatus and computer program product are provided for controlling a functional road object. For example, at least one processor receives road sign attribute data indicating at least one attribute of a road sign and receives weather forecast data indicating a weather forecast of a location in which the road sign is disposed. The road sign includes at least one machinery for mitigating exposure to one or more weather conditions. The at least one processor identifies a state of visibility for the road sign using the road sign attribute data and the weather forecast data and generates a control signal for controlling the at least one machinery using the state of visibility.

A method, apparatus and computer program product are provided for controlling a functional road object. For example, at least one processor receives road sign attribute data indicating at least one attribute of a road sign and receives weather forecast data indicating a weather forecast of a location in which the road sign is disposed. The road sign includes at least one machinery for mitigating exposure to one or more weather conditions. The at least one processor identifies a state of visibility for the road sign using the road sign attribute data and the weather forecast data and generates a control signal for controlling the at least one machinery using the state of visibility.

Portable traffic message signs configured for use on or near roadways, highways, sidewalks, and/or other travel routes. The portable traffic message sign may be configured to provide instructions, warnings, alerts, and/or other information for travelers. In some embodiments, the portable traffic message sign may be configured to be adaptive in response to sensed weather, traffic, and/or other conditions. For example, the portable traffic message sign may have a controller determining suitable message content to display, the message content reflecting a present traffic and/or weather condition. Moreover, the message sign controller may select, based on a speed of travel of traffic, words, phrases, and/or pages to display the message content such that the message may be perceivable by oncoming travelers. The controller may control height, angle of rotation, and/or other orientation parameters of the message sign toward a point of aim in order that the message may be perceivable by travelers.

Portable traffic message signs configured for use on or near roadways, highways, sidewalks, and/or other travel routes. The portable traffic message sign may be configured to provide instructions, warnings, alerts, and/or other information for travelers. In some embodiments, the portable traffic message sign may be configured to be adaptive in response to sensed weather, traffic, and/or other conditions. For example, the portable traffic message sign may have a controller determining suitable message content to display, the message content reflecting a present traffic and/or weather condition. Moreover, the message sign controller may select, based on a speed of travel of traffic, words, phrases, and/or pages to display the message content such that the message may be perceivable by oncoming travelers. The controller may control height, angle of rotation, and/or other orientation parameters of the message sign toward a point of aim in order that the message may be perceivable by travelers.

Technologies for communicating roadway information includes a plurality of roadway markers configured to propagate communications amongst each other. To do so, each roadway marker is configured to transmit communications to one or more other roadway markers. The communications may include sensor data generated by a sensor of a roadway marker. One or more roadway markers may transmit the sensor data to a roadway controller. Additionally or alternatively, the communication may include an alert message. A roadway marker may include a local alert device and be configured to activate the alert device in response to receiving an alert message. Additionally, one or more roadway markers may communicate with a roadway controller, a roadway traffic device, and/or an in-vehicle computing system of a vehicle to propagate roadway marker sensor data and/or alert messages. The roadway controller may be configured to control the roadway traffic devices, roadway makers, and/or communicate with remote computing devices.