- Observe the speed suggesting stripes.
Compare with other countries; f.e. Spain,
Pakistan. Norway brought the number down to the limit
(one stroke, would that still work?).
- The number of boulders is also reduced to the absolute minimum.
Only Belgium has an old sign with only two rocks.
Learn more about the Boulder statistics.
- The number of rocks falling is less than the number already down.
The reverse is true on all other signs in the collection. Check that out.