Reversible Reflective Sheeting Panels for Traffic Barriers
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Solution Overview
Problem
Current vehicle protection barriers, particularly those used in pedestrian protection and traffic separation, face challenges in effectively attenuating vehicular impact forces and managing debris dispersion, especially when made of plastic without sufficient ballasting or energy absorption capabilities to meet stringent crash test requirements like TL-2 and TL-3.
Innovation Solution
The development of a transition barrier module with a containment impact sled and end treatment array that includes unfilled plastic barrier modules and ballasted modules, along with a unique interlocking knuckle design and wire rope cable reinforcement, to absorb and distribute impact energy, and a portable reflective sheeting system with reversible striping patterns for traffic management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If plastic barrier modules are used without ballasting material, then the barrier is lighter and easier to install, but the energy absorption and impact attenuation capability is insufficient
Solution Approach 1:
The barrier system is divided into modular plastic barrier modules that can be assembled in sequences. Each module is lightweight and can be handled easily, but when combined in series they provide cumulative energy absorption. The modules are connected through interlocking knuckles to form a continuous barrier structure that attenuates impact forces through progressive deformation.
Solution Approach 2:
The plastic barrier modules are designed with inherent energy-absorbing characteristics through their structural geometry and material properties. The modules are configured to deform in a controlled manner during impact, absorbing energy before it can be transmitted to protected areas. This pre-engineered cushioning capability allows the barrier to function effectively without requiring additional ballasting material.
2Reliability
If reflective sheeting is permanently affixed to traffic management devices, then the appearance is professional and durable, but changing the striping pattern requires replacing the entire sheeting
Solution Approach 1:
The reflective sheeting is divided into multiple removable panels that can be independently attached and detached from the traffic management device. Each panel displays a portion of the overall striping pattern, and panels can be reconfigured or replaced to change the pattern without affecting other portions of the sheeting. This segmented approach maintains durability through proven attachment methods while enabling flexible pattern changes.
Solution Approach 2:
The sheeting system transitions from a static, permanently affixed configuration to a dynamic, reconfigurable system. Panels can be attached and removed as needed, allowing the striping pattern to adapt to different traffic management requirements. The attachment mechanism provides sufficient reliability for durable installation while enabling easy reconfiguration when pattern changes are required.
Data Source
AI summary
A system for displaying a desired reflective sheeting striping pattern on a traffic management device includes providing a portable panel having reflecting sheeting affixed to a face thereof, orienting the portable panel as desired, and affixing the panel to the device using fastener holes disposed about a perimeter of the panel. The displayed striping pattern may be easily changed by removing the panel from the device, turning the panel over to display an opposing side, on which is displayed a different striping pattern, and reattaching the panel to the traffic management device so that the opposing side of the panel is displayed, or by removing the panel from the traffic management device, rotating the panel by 90 degrees, 180 degrees, or 270 degrees, and then reattaching the panel to the traffic management device so that the same particular striping pattern is oriented in a different direction.