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THE POTHOLE PATROL Using a Mobile Sensor Network for Road Surface Monitoring Timothy Werner.

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Presentation on theme: "THE POTHOLE PATROL Using a Mobile Sensor Network for Road Surface Monitoring Timothy Werner."— Presentation transcript:

1 THE POTHOLE PATROL Using a Mobile Sensor Network for Road Surface Monitoring Timothy Werner

2 Problem Potholes are everywhere Hard to find Car damage Lawsuits against the state Insurance claims

3 Solution

4 Test Deployment Attached to seven taxis in Boston for 10 days Covered nearly 2500 distinct kilometers Nearly 10000km total

5 Test Deployment - Accelerometer Placement Attached to car’s dashboard (glove compartment) Accurate Unobtrusive

6 Test Deployment – Training Data Trained for type of anomaly Crosswalks and Expansion Joint Railroad Crossing Pothole Manhole Stopping Turning

7 Pothole Detection Algorithm Speed High-pass z-peak xz-ratio Speed vs z ratio

8 Pothole Detection Algorithm Blacklisting Speed bumps Bridges Etc False Negatives – absence of reports does not mean a smooth road Drivers naturally try to avoid pot holes Roads are wide

9 Evaluation Tested on three data sets Carefully labeled data Loosely labeled data The taxis driving around Boston

10 Evaluation - Goals Detect a low number of anomalies on smooth roads Missing potholes is okay

11 Evaluation Classification accuracy on hand-labeled data Performance improvement using loosely labeled training data Performance on loosely labeled roads Spot-checks on uncontrolled data

12 Evaluation - Performance


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