River Thames frost fairs River Thames frost fairs River Thames frost fairs were held on the tideway of the River Thames at London in some of the winters between the 17th century and early 19th century, during the period known as the Little Ice Age, when the river froze over. During that time the British winter was more severe than it is now, and the river was wider and slower, further impeded by the medieval Old London Bridge. Even at its peak, in the mid-17th century, the Thames freezing at London was less frequent than modern legend sometimes suggests, never exceeding about one year
Controlled-access highway The Queen Elizabeth II Bridge / Dartford tunnel at London Orbital, is an example of this. London Oribital or the M25 is a motorway surrounding London, but at the last River Thames crossing before its mouth, motorway rules don't apply. (At this crossing the London Orbital is labeled A282 instead.) There are many differences between countries in their geography, economy, traffic growth, highway system size, degree of urbanization and motorization, etc.; all of which need to be taken into consideration when comparisons are made. According to some EU papers, safety progress on motorways is the result of several changes, including