Editing International E-road network (section)

==Road design standards==
The following design standards should be applied to Euroroutes unless there are exceptional circumstances (such as mountain passes etc.):<ref name=1975doc/>
* Built-up areas shall be by-passed if they constitute a hindrance or a danger.
* The roads should preferably be [[motorway]]s or express roads (unless traffic density is low so that there is no congestion on an ordinary road).
* They should be homogeneous and be designed for at least {{convert|80|km/h|mph|round=5|abbr=on}} (see [[Design speed]]). The motorways should be at least {{convert|100|km/h|mph|round=5|abbr=on}}.
* Gradients should not exceed 8% on roads designed for {{convert|80|km/h|mph|round=5|abbr=on}}, decreasing to 4% on roads designed for {{convert|120|km/h|mph|round=5|abbr=on}} traffic.
* The radius of curved sections of road should be a minimum of {{convert|120|m|ft|abbr=on}} on roads designed for {{convert|60|km/h|mph|round=5|abbr=on}} rising to {{convert|1000|m|ft|abbr=on}} on roads designed for {{convert|140|km/h|mph|round=5|abbr=on}}.
* "Stopping distance visibility" should be at least {{convert|70|m|ft|abbr=on}} on roads designed for {{convert|60|km/h|mph|round=5|abbr=on}}, rising to {{convert|300|m|ft|abbr=on}} on roads designed for {{convert|140|km/h|mph|round=5|abbr=on}}.
* Lane width should be at least {{convert|3.5|m|ft|abbr=on}} on straight sections of road. This guarantees adequate clearance for any vehicle having a superstructure of width {{convert|2.5|m|ft|abbr=on}} which is the maximum specified width in Directive 2002/7/EC of the European Parliament and of the Council which recognise some specific tolerances for some specific countries.
* The shoulder is recommended to be at least {{convert|2.5|m|ft|abbr=on}} on ordinary roads and {{convert|3.25|m|ft|abbr=on}} on motorways.
* Central reservations should be at least {{convert|3|m|ft|abbr=on}} unless there is a barrier between the two carriageways.
* Overhead clearance should be not less than {{convert|4.5|m|ft|abbr=on}}.
* Railway intersections should be at different levels.

These requirements are meant to be followed for road construction. When new E-roads have been added these requirements have not been followed stringently. For example, the [[European route E45|E45]] in Sweden, added in 2006, has long parts with {{convert|6|m|ft|0|abbr=on}} width or the [[European route E22|E22]] in eastern Europe forcing drivers to slow down to {{convert|30|km/h|mph|round=5|abbr=on}} by taking the route through villages. In Norway, parts of the [[European route E10|E10]] are {{convert|5|m|ft|0|abbr=on}} wide and in Central Asia even some gravel roads have been included.