 with markings that prevent uphill fast traffic using the downhill lane to pass slightly slower uphill vehicles themselves passing "crawlers", but still allowing downhill vehicles to overtake using the faster uphill lane if necessary, which has the effect of creating a false "center" line between the two regular lanes).In the UK the additional climbing lane and the single downhill lane are generally separated by double white solid lines.It is an offence to position any part of your vehicle to the right of a double white line punishable by 3 penalty points, therefore this marking in itself prohibits any use of the climbing lane for overtaking by vehicles travelling downhill.