Abstract: A single anchor terminal is provided for a roadside wire rope barrier. The single anchor terminal includes a release post, a brace, and an anchor base. The brace supports the release post in an upright position and extends from the release post to the anchor base. The brace has a first portion attached to the release post and a second portion coupled to the first portion with a release component. The anchor base includes a main post that supports the release post and a brace anchor that is coupled to the main post.

Abstract: A cable anchor deflector bracket includes a first portion and a second portion. The first portion is coupled to a guardrail at a location adjacent to a cable anchor bracket, which is an attachment point where a cable couples to the guardrail. The second portion slopes outwardly away from the guardrail and is proximate to an end of the cable anchor bracket and the end of the cable anchor assembly.

Abstract: An end treatment for a guardrail safety system includes a terminal portion of a guardrail beam comprising a downstream end and upstream end, a first tension cable coupled to an upstream end of the terminal portion. An extruder configured to receive at least a portion of the guardrail beam and at least a portion of the first tension cable, and a terminal support post installed adjacent the roadway at an upstream end of the terminal portion of the guardrail beam. The extruder includes a narrowing throat providing a channel in which at least a portion of the guardrail beam is disposed. The narrowing throat is configured to flatten the guardrail beam in response to a collision with a vehicle moving the extruder in a downstream direction along the guardrail beam. The terminal support post coupled to an upstream end of the first tension cable.

Abstract: A cable anchor deflector bracket includes a first portion and a second portion. The first portion is coupled to a guardrail at a location adjacent to a cable anchor bracket, which is an attachment point where a cable couples to the guardrail. The second portion slopes outwardly away from the guardrail and is proximate to an end of the cable anchor bracket and the end of the cable anchor assembly.

Abstract: A single anchor terminal is provided for a roadside wire rope barrier. The single anchor terminal includes a release post, a brace, and an anchor base. The brace supports the release post in an upright position and extends from the release post to the anchor base. The brace has a first portion attached to the release post and a second portion coupled to the first portion with a release component. The anchor base includes a main post that supports the release post and a brace anchor that is coupled to the main post.

Abstract: A single anchor terminal is provided for a roadside wire rope barrier. The single anchor terminal includes a release post, a brace, and an anchor base. The brace supports the release post in an upright position and extends from the release post to the anchor base. The brace has a first portion attached to the release post and a second portion coupled to the first portion with a release component. The anchor base includes a main post that supports the release post and a brace anchor that is coupled to the main post.

Abstract: According to a particular embodiment, an end treatment for a guardrail safety system includes a terminal portion of a guardrail beam comprising a downstream end and upstream end, a first tension cable coupled to an upstream end of the terminal portion. an extruder configured to receive at least a portion of the guardrail beam and at least a portion of the first tension cable, and a terminal support post installed adjacent the roadway at an upstream end of the terminal portion of the guardrail beam. The extruder includes a narrowing throat providing a channel in which at least a portion of the guardrail beam is disposed. The narrowing throat is configured to flatten the guardrail beam in response to a collision with a vehicle moving the extruder in a downstream direction along the guardrail beam. The terminal support post coupled to an upstream end of the first tension cable.

Abstract: A single anchor terminal is provided for a roadside wire rope barrier. The single anchor terminal includes a release post, a brace, and an anchor base. The brace supports the release post in an upright position and extends from the release post to the anchor base. The brace has a first portion attached to the release post and a second portion coupled to the first portion with a release component. The anchor base includes a main post that supports the release post and a brace anchor that is coupled to the main post.

Abstract: A terminal portion of a guardrail safety system includes a terminal portion of a guardrail beam having a downstream end and upstream end. The terminal portion of the guardrail beam slopes from a height appropriate for redirecting an errant vehicle to a height proximate the surface of the ground at an upstream end of the terminal portion. Support posts are installed adjacent a roadway in spaced apart relation to one another and are coupled to the terminal portion of the guardrail beam. A terminal support post is installed adjacent the roadway at an upstream end of the terminal portion of the guardrail beam. The terminal support post couples to an upstream end of the terminal portion of the guardrail beam by a resistive, tensile coupling that maintains tension in the terminal portion of the guardrail beam. The resistive, tensile coupling is maintained between the terminal support post and the guardrail beam during an end-on or re-directive impact by a vehicle.

Abstract: A guardrail safety system includes a guardrail beam operable to contain and redirect an errant vehicle to prevent the vehicle from leaving a roadway. At least a portion of the guardrail beam includes a thrie beam. A support post is coupled to the guardrail beam and includes a lower portion, a mid portion, and an upper portion. The lower portion is installed below grade adjacent the roadway. The mid portion lies substantially adjacent the grade and is weakened about a first axis without being substantially weakened about a second axis that is generally perpendicular to the first axis. An upper portion is releasably coupled to the guardrail beam such that the upper portion is uncoupled from the guardrail beam when the mid portion yields about the first axis.

Abstract: A terminal portion of a guardrail safety system includes a terminal portion of a guardrail beam having a downstream end and upstream end. The terminal portion of the guardrail beam slopes from a height appropriate for redirecting an errant vehicle to a height proximate the surface of the ground at an upstream end of the terminal portion. Support posts are installed adjacent a roadway in spaced apart relation to one another and are coupled to the terminal portion of the guardrail beam. A terminal support post is installed adjacent the roadway at an upstream end of the terminal portion of the guardrail beam. The terminal support post couples to an upstream end of the terminal portion of the guardrail beam by a resistive, tensile coupling that maintains tension in the terminal portion of the guardrail beam. The resistive, tensile coupling is maintained between the terminal support post and the guardrail beam during an end-on or re-directive impact by a vehicle.

Abstract: A terminal portion of a guardrail safety system includes a terminal portion of a guardrail beam having a downstream end and upstream end. The terminal portion of the guardrail beam slopes from a height appropriate for redirecting an errant vehicle to a height proximate the surface of the ground at an upstream end of the terminal portion. Support posts are installed adjacent a roadway in spaced apart relation to one another and are coupled to the terminal portion of the guardrail beam. A terminal support post is installed adjacent the roadway at the upstream end of the terminal portion of the guardrail beam. The terminal support post couples to an upstream end of the terminal portion of the guardrail beam by a resistive, tensile coupling that maintains tension in the terminal portion of the guardrail beam. The resistive, tensile coupling is maintained between the terminal support post and the guardrail beam during an end-on or re-directive impact by a vehicle.

Abstract: In accordance with a particular embodiment of the present invention, an end treatment of a guardrail safety system includes a terminal portion of a guardrail beam that has a downstream end and an upstream end. The terminal portion of the guardrail beam slopes from a first vertical height appropriate for redirecting an errant vehicle to a second vertical height proximate the surface of the ground at an upstream end of the terminal portion of the guardrail beam. A flattening portion forms a channel through which the terminal portion of the guardrail beam is disposed. A vertical dimension of the channel is greater at a downstream end of the flattening portion than at an upstream end of the flattening portion. An impact plate is connected to the flattening portion for engaging an impacting vehicle at an end of said guardrail beam. During an end-on impact, the impact plate and the flattening portion are advanced longitudinally along the guardrail in a downstream direction by the vehicle.

Abstract: In accordance with a particular embodiment of the present invention, an end treatment of a guardrail safety system includes a terminal portion of a guardrail beam that has a downstream end and an upstream end. The terminal portion of the guardrail beam slopes from a first vertical height appropriate for redirecting an errant vehicle to a second vertical height proximate the surface of the ground at an upstream end of the terminal portion of the guardrail beam. A flattening portion forms a channel through which the terminal portion of the guardrail beam is disposed. A vertical dimension of the channel is greater at a downstream end of the flattening portion than at an upstream end of the flattening portion. An impact plate is connected to the flattening portion for engaging an impacting vehicle at an end of said guardrail beam. During an end-on impact, the impact plate and the flattening portion are advanced longitudinally along the guardrail in a downstream direction by the vehicle.

Abstract: In accordance with a particular embodiment of the present invention, a terminal portion of a guardrail safety system includes a terminal portion of a guardrail beam having a downstream end and upstream end. The terminal portion of the guardrail beam slopes from a height appropriate for redirecting an errant vehicle to a height proximate the surface of the ground at an upstream end of the terminal portion. Support posts are installed adjacent a roadway in spaced apart relation to one another and are coupled to the terminal portion of the guardrail beam. A terminal support post is installed adjacent the roadway at an upstream end of the end terminal. The terminal support post couples to an upstream end of the terminal portion of the guardrail beam by a resistive, tensile coupling that maintains tension in the terminal portion of the guardrail beam. The resistive, tensile coupling is maintained between the terminal support post and the guardrail beam during an end-on or re-directive impact by a vehicle.

Abstract: A cable guardrail release system includes a firsts number of anchor posts installed adjacent a roadway. Each of the first number of anchor posts secures an end of a respective cable. Each anchor post is operable to release the respective cable secured by the anchor post upon a vehicle impact to the anchor post. The system may include a length of need section that includes a plurality of intermediate support posts each configured to support each of the respective cables. The length of need section may include portions of each of the respective cables running in between the plurality of intermediate support posts. Each anchor post may be configured to resist release of the respective cable secured by the anchor post upon a vehicle impact to the length of need section generally at an angle to the flow of traffic on the roadway.

Abstract: According to one embodiment, a cable anchor system for an end terminal includes a cable anchor bracket configured to couple to a guardrail, in which the cable anchor bracket includes a flat plate having an aperture formed therein and a plurality of protrusions extending from a plane containing the aperture. The protrusions are configured to releasably engage the guardrail.

Abstract: According to one embodiment of the invention, an energy-absorbing device includes a section of material having a plurality of crush zones along a longitudinal length thereof, a first crush zone of the plurality of crush zones including a pair of opposed first bends formed in a first side and a second side of the section, a pair of opposed second bends formed in a third side and a fourth side of the section, and a first set of notches spaced around a perimeter of the section at a longitudinal location corresponding to the first bends and second bends. The first bends project in a direction that is one of inward and outward and the second bends project in a direction opposite that of the first bends. At least one of the other crush zones includes a second set of notches spaced around the perimeter of the section.

Abstract: The present invention provides a system, method and apparatus for supporting guardrail posts. The system includes a foundation tube, a guardrail post partially disposed within the foundation tube, and a spacer disposed between the guardrail post and the foundation tube. The spacer has overall dimensions of approximately (a) a first dimension that is smaller than a first interior dimension of the foundation tube, (b) a second dimension that is equal to or less than a second interior dimension of the foundation tube less an exterior dimension of the guardrail post and (c) a third dimension greater than or equal to one half of the first dimension.

Abstract: Guardrail installation designs are described that incorporate a box beam rail as the structural rail member. The box beam rail member may have an open cross-section or a closed cross-section. An impact head is provided to bend and deflect the rail member during an end-on collision, allowing the rail member to be deflected away from the roadway and out of the path of an end-on impacting vehicle. The impact head includes a striking face and a chute portion that receives the box beam rail member therewithin. In addition to bending and deflecting the rail member, the impact head may also include a flattening section for flattening the rail member.