[1] The Campaign argues that 2,000,000 people[2] have been killed or seriously injured on Europe's roads in the last decade, costing €160billion per year, or 2% of GDP.
[4] The idea is that the European roads must be "self-explaining" and forgiving so that they address or do not exacerbate routine human driving errors.
In slippery condition, such as in rain or on ice, such over-banked curves cause most problem to vehicles driven at too slow speed.
Both new and old roads often have insufficient drainage gradient at the entrance and exit of sharp outercurves, causing water pooling in rain and forming local surprising ice spots in cold climate.
This extreme overrisk is considered strongly related to improper banking and insufficient drainage gradient at outercurves.
The linked EU Roadex III report below gives demonstrations as on how to analyze Profilograph data to identify excessive accident risk in outercurves.