A warning triangle structure includes a base, a triangle, a number of connecting rods, and a braking device. The triangle includes a bottom end and a top end opposite the bottom end. The bottom end is fixedly mounted to the base. Each of the connecting rods includes a first end and a second end. The first end is fixedly coupled to the base, and the second end is mounted with a rotatable support wheel. The braking device is installed at the second end of at least one of the connecting rods. The braking device includes a transmission shaft coupled to the support wheel. The braking device controls the support wheel to stop rotating by stopping the transmission shaft from rotating.

A warning triangle structure includes a base, a triangle, a number of connecting rods, and a braking device. The triangle includes a bottom end and a top end opposite the bottom end. The bottom end is fixedly mounted to the base. Each of the connecting rods includes a first end and a second end. The first end is fixedly coupled to the base, and the second end is mounted with a rotatable support wheel. The braking device is installed at the second end of at least one of the connecting rods. The braking device includes a transmission shaft coupled to the support wheel. The braking device controls the support wheel to stop rotating by stopping the transmission shaft from rotating.

A post base device and system is provided. The post base device includes a first support base, a second support base, and one or more post brackets. The post brackets may include legs which attach to one of the first support base or the second support base. The post bracket may further include an opening which receives a post.

A modular post for use in a barrier system comprises a post component and a base. The post component is configured to be attached or attachable on, to or in the base in a deployed configuration. The post component is configured to be housed within the base when the modular post is in a stored configuration. A method of using a modular post suitable for use in a barrier system is also provided. The method comprises providing a post component and a base. The post component is configured to be attached or attachable on, to or in the base in a deployed configuration. The post component is receivable or configured to be housed within the base when the modular post is in a stored configuration.

A portable temporary road sign structure comprises a sheet material substrate cut into a flat pattern having three interconnected panels: a display panel; a base panel; and a brace panel. The panels are formed to enable deployment into a self-supporting configuration in which the display panel is held upright when the base panel is placed on the ground. For transportation between sites the base and brace panels can be folded flat against the display panel whereby respective handle align for ease of carrying. Various apertures and formations are provided to enable the road sign structure to be held in place, when deployed, by roadside fixtures or weighted bollards.

A portable temporary road sign structure comprises a sheet material substrate cut into a flat pattern having three interconnected panels: a display panel; a base panel; and a brace panel. The panels are formed to enable deployment into a self-supporting configuration in which the display panel is held upright when the base panel is placed on the ground. For transportation between sites the base and brace panels can be folded flat against the display panel whereby respective handle align for ease of carrying. Various apertures and formations are provided to enable the road sign structure to be held in place, when deployed, by roadside fixtures or weighted bollards.

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.

A two piece temporary fence support. The support has a base having a pair of apertures disposed therethrough proximate the midpoint of the base, a plate having a pair of apertures disposed therethrough in matching dimension to the base, a pair of posts extending vertically from the plate, each posts permitting a fence panel to be mounted thereon, and a pair of fasteners disposed through the apertures of the base and the apertures of the plate to fasten the plate to the base.

A warning structure includes a bracket and a warning member mounted on the bracket. The bracket includes a main body, rollers rotationally mounted to the main body, and a stopping assembly including a rotating mechanism and a stopping member coupled to the rotating mechanism. The rotating mechanism is rotationally coupled to the main body. One of the rollers is mounted adjacent to the stopping member. When the rotating mechanism is rotated, the stopping member is engaged with a ground to prevent the bracket from moving.