Interpreting road roughness data

Road roughness parameters, Avg. roughness and Max. roughness are available both as data augmented to videos and as standalone data. The value scale ranges from 0 to 12 m/km, where 0 represents the least roughness and 12 or more the most.

1. Avg. roughness: The average roughness across all lanes attached to the centerline. This value is based on measurements over an extended period, with the latest measurements weighted most heavily in the aggregation.
2. Max. roughness: The maximum roughness across all lanes attached to the centerline. This value is based on measurements over an extended period, with the latest measurements weighted most heavily in the aggregation.

In addition to the Avg. roughness and Max. roughness parameters, which represent absolute road roughness measurements, RoadAI provides relative change parameters that represent how road roughness changes over time. These change parameters are available only in the Road roughness feature layer. The value scale ranges from ‑6 m/km to 6 m/km, where negative values indicate a decrease and positive values an increase in road roughness over a specific time period.

There are four change parameters, each representing a different time interval from 3 months to 2 years. Data for all of them is calculated using the same principle. For example, 6 mo Roughness change shows the increase or decrease in road roughness over the previous 6 months from the date of the data point.