Is there some open data about road surface roughness?
In Italy there is a project named SmartRoadSense, started on February 21th, 2015. The goal of this project is monitoring of Italy's road surface (487,700 km ) and all results are open data.
Now, after nine months, has been collected more than 24,000 km of open data. In the site smartroadsense.it you can see two uses of this data, and donwload it.
The project use a simple Android application that senses the roughness via LPC coding (for more detail read the paper SmartRoadSense: Collaborative Road Surface Condition Monitoring). In the roadmap there is also the development of the application for the others platform.
You can see a short movie which showing the four phases of the SmartRoadSense process: sampling, map matching, aggregation, and presentation here.
The data are available at smartroadsense.it. You find an only CSV file with six fields:
- PPE, roughness value in this path
- OSM_ID, ID of the road in OpenStreetMap
- HIGHWAY, category of the road in OpenStreetMap
- UPDATED_AT, date of the last update of this roughness
 "Italy." The World Factbook. Central Intelligence Agency, 2013.
The international version of SmartRoadSense will be announced today during a press conference in Urbino (Italy). http://smartroadsense.it/blog/en/crowd4roads-the-european-project/