A method of operating an incursion warning system for a work zone, the incursion warning system comprising: a plurality of sensor units arranged about a perimeter of the work zone; and a plurality of alarm units each comprising one or more of an audio, visual or haptic alarm operable to warn a workforce of a potential danger in response to a detected breach into the work area; the method comprising: establishing a geo-zone delimiting a geographical area that includes at least part of the work zone; and a set of rules associated with the geo-zone; deriving an instruction for one of the alarm units determined to be in the geo-zone from the set of rules based on a characteristic of the alarm unit and a characteristic(s) of one or more other alarm units determined to be within the geo-zone; and wherein the instruction is derived in response to a change in a characteristic of the alarm unit and/or the one or more other alarm units and/or one or more of the sensor units within the geo-zone.

A method of operating an incursion warning system for a work zone, the incursion warning system comprising: a plurality of sensor units arranged about a perimeter of the work zone; and a plurality of alarm units each comprising one or more of an audio, visual or haptic alarm operable to warn a workforce of a potential danger in response to a detected breach into the work area; the method comprising: establishing a geo-zone delimiting a geographical area that includes at least part of the work zone; and a set of rules associated with the geo-zone; deriving an instruction for one of the alarm units determined to be in the geo-zone from the set of rules based on a characteristic of the alarm unit and a characteristic(s) of one or more other alarm units determined to be within the geo-zone; and wherein the instruction is derived in response to a change in a characteristic of the alarm unit and/or the one or more other alarm units and/or one or more of the sensor units within the geo-zone.

An apparatus including a collapsible body, a base, and a cap. The body including a spring element coupled to the body to apply an extension force. The spring element having a helical geometry. The collapsible body has a high visibility characteristic. The base is coupled to a first end of the body and has a shape to secure the body and the spring element relative to the base and to receive the body in a collapsed state. The base includes a base coupling element to secure the body in the collapsed state. The cap is coupled to a second end of the body opposite the first end, the cap to, at least partially, close the second end of the body.

An apparatus including a collapsible body, a base, and a cap. The body including a spring element coupled to the body to apply an extension force. The spring element having a helical geometry. The collapsible body has a high visibility characteristic. The base is coupled to a first end of the body and has a shape to secure the body and the spring element relative to the base and to receive the body in a collapsed state. The base includes a base coupling element to secure the body in the collapsed state. The cap is coupled to a second end of the body opposite the first end, the cap to, at least partially, close the second end of the body.

Sign apparatuses are disclosed, configured with a base, a display panel, and a support post. The base of the sign apparatus may include a planter portion containing display elements such as plant material, where the plant material comprises at least a portion of the ballast weight necessary to stabilize the sign apparatus against the wind and other forces. The base may also include a ballast area for holding additional ballast material.

Sign apparatuses are disclosed, configured with a base, a display panel, and a support post. The base of the sign apparatus may include a planter portion containing display elements such as plant material, where the plant material comprises at least a portion of the ballast weight necessary to stabilize the sign apparatus against the wind and other forces. The base may also include a ballast area for holding additional ballast material.

A system includes a directional sign having a plurality of lights capable of indicating an intended traffic direction, a telescoping central mast coupled to the sign, a base coupled to the central mast, the base having wheels, and at least one light in communication with at least one power source, the at least one light being disposed on the telescoping central mast.

A system includes a directional sign having a plurality of lights capable of indicating an intended traffic direction, a telescoping central mast coupled to the sign, a base coupled to the central mast, the base having wheels, and at least one light in communication with at least one power source, the at least one light being disposed on the telescoping central mast.

A weighted unit is provided. The weighted unit includes an enclosed shape, the shape having horizontal channels running along the entire base of the unit from one side to an opposing side, such that the horizontal channel is open to each opposing side, the weighted unit being placed over a horizontal and/or vertical member of an object to be held down with the channel engaging the horizontal member to hold the object in place. Protrusions or other features are integrally formed in the weighted unit to allow the weighted unit to hang from the object to be weighed down without the weighted unit touching the ground. The weighted unit may be placed directly over the top of a horizontal member of the object to be weighed down without also engaging, or being placed around, a vertical component of the same object.

The present invention provides a device for displaying hazard indicia, having a stanchion defining a first end and a second end, whereby the first end defines a first cross section that is smaller than a second cross section of the second end; a base adapted to removably receive the second end of the stanchion so as to maintain the stanchion in a vertical position; and a means for allowing the device to be collinearly stacked on top of a second device such that only the second end of the device and the second end of the second device contact.