Signs according to this application are be configured to output content on a display for viewing by bystanders, occupants of vehicles, and so forth. In some instances, the sign may be oriented to output content within a certain range of view angles relative to the sign. Additionally, content output by the sign may be based at least in part on characteristics of the environment in which the sign is located, a speed of the vehicle, a number of viewers within the viewing range of the sign, weather conditions, and so forth. Sensor(s) may sense conditions within the environment for controlling an operation of the sign. While examples are described herein in which signs include electronic displays, in some examples, signs according to this disclosure can be non-electronic (e.g., plastic, wood, paper, and/or metal signs with content painted, printed, or otherwise applied thereto).

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 high efficiency traffic sign includes a retroreflective film and a diffuser film. The retroreflective film is located between the body of the traffic sign and the diffuser film so as to form an indication face. The traffic sign is located higher than a road and the indication face faces coining vehicles on the road. A projection light source module is located on one side of the road and emits a light beam toward the traffic sign and the light beam covers the indication face. The light beam passes through the diffuser film and reaches retroreflective film. The light beam is then reflected and passes through the diffuser film again, the diffuser film changes the reflective path of the light beam which passes through the diffuser film to form a diversified light beam to allow the drivers of the coining vehicles on the road to see the traffic sign clearly.

Provided here are mobile way-finder signs having changeable panels that are internally illuminated. Internal illumination may be caused by battery-powered LED light bulbs. The sign may include a base, an inner frame, an outer frame, a changeable panel, and a retainer. The sign may include a power toggle switch and interior LEDs and wiring within the inner or outer frames. The sign may include a rechargeable battery pack located under the base in a snap-in holder, and heavy-duty black polyurethane wheels.

A sign cover includes a first portion fixed at a top side thereof with a top side of a second portion. Peripheral edges of the portions extend past a peripheral edge of a sign by a margin area when the portions are positioned over a front side and a rear side of the sign in a deployed configuration. The margin area of the portions each include a plurality of two-part mechanical fasteners. As such, in use, with the first portion and the second portion draped over the sign, the two-part mechanical fasteners hold the cover onto the sign. The first portion may include one or more transparent pockets for displaying one of several alternate signs.

A safety lighting assembly enabled to cast light rearward toward the surface to which it is attached. The safety light assembly provides additional portions for emitting light in selected directions so as to facilitate situation awareness of the object.

Apparatus, systems and methods for providing one or more accessories on a support surface include a base releasably engageable with the support surface, a housing configured to carry at least a first accessory and be releasably engaged with the base and an elongated carrier rod configured to carry at least a second accessory and be releasably engaged with the base.

A variable traffic safety sign is useful in informing road users of the possibility of a surface of a road or bridge section being wet or frozen without using an additional external power source by exactly expressing freezing and wet roadbed conditions of the road or bridge section using a thermochromic paint and a humidity indicator paint, and also allowing road drivers to exactly recognize the roadbed conditions of the road or bridge section by displaying the freezing and wet roadbed conditions of the road or bridge section conditions in response to changes in temperature and humidity, respectively. Also, the variable traffic safety sign is readily applicable to structures such as a bridge crash barrier, a traffic safety sign board, a bridge guardrail, a road shoulder, and an inner part, entrance and exit of a tunnel.

A traffic sign cover including a planar member having a first and second side and shaped to be place on a side of an existing sign. Holding members project from the sides of the planar member and optionally along a portion of the outer edges. The holding member and first side form a first slot therebetween for receiving and retaining the existing sign. The second holding member and second side form a second slot therebetween for receiving and retaining a temporary sign. The planar member is slideable upon the existing sign until a top receiving feature contacts a top edge of the existing sign, overlaying a side of the existing sign with the planar member. The temporary sign is slideable upon the planar member until a bottom edge contacts a bottom receiving feature of the planar member, overlaying and covering a side of the planar member with a temporary sign.