Obstacle Emergence Risk and Road Patrol Policy

<table>Risk management limit (number of road obstacles) and the minimum patrol cycle (confidence level <svg height="11.125" id="M199" style="vertical-align:-0.1638pt" version="1.1" viewbox="0 0 58.75 11.125" width="58.75" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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Advances in Civil Engineering

Obstacle Emergence Risk and Road Patrol Policy

Figure 4