SAFETY EDGE UPDATE

Jason J. Siwula, PE – KYTC Traffic Engineering Safety Section

Benefits of the Safety Edge

Providing “Due Care”

Aid vehicle re-entry

Increased Pavement Edge Durability

Reduced Crashes Over Life of the Pavement

When and Where Should I Use This?

There will be 2-4 projects per District for the FY14 FE06 cycle.

Lift thickness does not correlate with edge depth.

Lift Thickness vs. Edge Depth

Hardware

Carlson Safety Edge End Gate

Troxler SafeT Slope

TransTech Shoulder Wedge Maker TM

Advantedger

Unacceptable Hardware

Notes, notes, notes…

Shoulder Clipping

Minor Amount of Soil Disturbance Soil/Vegetation High Next to Road

Lateral Placement of Safety Edge

Keep lane edge on sound material as rest of lane

Existing pavement edge

Breakpoint on wedge

Toe of wedge

Finished Surface

Maximum Width of Installation

Roller Pattern

Comparison of Edges

Paving with the Safety Edge

Paving without the Safety Edge shoe

Maine Safety Edge Installation

Desirable Results

Undesirable Results

*Unapproved Hardware

Note the gap between the safety edge device

and the end plate.

Material overflow into spring

Radius digging

Noted Issues

Grand Rapids, Michigan – BaileyJuly 2011

First 2” HMA lift w/o SESecond 2” HMA lift with SEBefore rolling

Density Measurement

Density Results

130.0

132.0

134.0

136.0

138.0

140.0

142.0

144.0

142.7 142.3

135.2134.6

Right Wheel Path

Edge of Pavement

De

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Safety Edge Control

•Everything that you do can positively affect safety.•Safety is everyone’s responsibility.•Even one crash prevented is significant.

Remember…