Reversible Pavement Marker with Tapered Adhesive Locking
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Solution Overview
Problem
Existing pavement markers are prone to dislodgment due to environmental factors and vehicle impacts, leading to increased maintenance costs and safety concerns, as they are either dislodged from the pavement or become projectiles.
Innovation Solution
A durable pavement marker design featuring a body with vertically upright reflectors and an array of tapered openings for adhesive fixation, allowing for easy installation and self-washing capabilities to minimize damage from impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If raised markers with heavy iron casting are used, then visibility and snowplow guidance are improved, but the risk of dislodgment and projectile danger increases
Solution Approach 1:
The marker is divided into two main segments: a lightweight body containing the reflector and a separate heavy base plate. This segmentation allows the reflector to be lightweight while the base provides anchoring strength, resolving the contradiction between visibility (requiring a prominent reflector) and dislodgment resistance (requiring heavy anchoring).
Solution Approach 2:
The invention transitions from a single monolithic casting to a multi-component structure with a base plate embedded in the pavement and a body mounted above it. This dimensional change allows the marker to achieve both visibility (through the elevated reflector) and stability (through the embedded base) simultaneously.
2Reliability
If recessed markers with plastic bodies and epoxy fixation are used, then dislodgment resistance is improved, but maintenance cost and complexity increase due to periodic replacement
Solution Approach 1:
The base plate is pre-formed with integrated adhesive recesses and mounting features before installation. This preliminary preparation simplifies the installation process and ensures proper adhesive application, reducing installation time and potential errors that would increase maintenance costs.
Solution Approach 2:
The marker design incorporates self-aligning features and robust adhesive bonding that allow the marker to maintain its position without requiring frequent human intervention or complex maintenance procedures, thereby reducing maintenance costs.
3Illumination intensity
If reflectors are mounted protruding above pavement surface, then visibility is improved, but vulnerability to vehicle impact and environmental damage increases
Solution Approach 1:
The reflector is positioned within a recess in the body rather than protruding freely, providing structural cushioning and protection against direct vehicle impact. The recess acts as a protective feature that absorbs and distributes impact forces, preventing damage to the reflector while maintaining visibility.
4Reliability
If heavy iron casting is used for raised markers, then durability is improved, but material cost and manufacturing complexity increase
Solution Approach 1:
The marker uses a composite construction combining a lightweight body material (such as plastic or aluminum) with a separate heavy base plate (which could be metal). This composite approach provides the durability and weight needed for stability while reducing overall material cost compared to a fully metal construction.
Solution Approach 2:
The invention merges the functions of the reflector housing and the anchoring base into a single integrated assembly. The base plate with integrated mounting features combines structural support, anchoring, and reflector mounting functions, simplifying manufacturing and reducing the number of separate components needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The marker is securely mounted to the pavement, reducing the risk of dislodgment and maintenance costs while maintaining reflectivity and effectiveness in guiding vehicles, even under adverse conditions.
Implementation Method 1
into which adhesive may flow during marker installation
Implementation Method 2
A pavement marker provides visible delineation and reflects light from vehicle headlights back toward the vehicle operator
Data Source
AI summary
Reflective pavement markers held fixedly to a roadway by epoxy or adhesive include reflectors and a body with spaced top and bottom mounting faces, transverse forward and rearward faces, and lateral side faces. A recess formed in the forward and rearward faces of the body may receive and vertically mount a reflector therewithin. The reflectors have vertical outer faces that are orthogonal to the body mounting faces and angled 30°±15° relative to an orthogonal line from a lateral side face such that the marker generally has a parallelepiped shape. An array of openings, which may be closed or open, extend inwardly into the body from the top and bottom faces and have constricted openings to positively lock in the fixing adhesive and prevent the marker from easily lifting from the pavement.