Versie door MediaWiki default (overleg) op 15 sep 2010 om 00:38 (New page: * '''directionality''' - whether a road is one-way, two-way or no-entrance * '''grade''' - the level of a road with respect to surround roads. So a road would normally be a level grade. A ...)
- directionality - whether a road is one-way, two-way or no-entrance
- grade - the level of a road with respect to surround roads. So a road would normally be a level grade. A road going underneath in a tunnel would be a -1 grade. A road going over would be a +1 grade. At complicated junctions such as freeway interchanges there can be many levels. So on a flat map we assign levels to show that while the roads cross, they do not connect because they are at different heights
- freeway - motorway; the major road system in your country
- geometry - the layout of a road. Each road is made up of straight line segments. These can be arbitrarily short, effectively allowing curves
- motorway - freeway; the major road system in your country
- ramp - a freeway entrance or exit; sliproad. Ramps may be on-ramps or off-ramps. Ramps are often at a different grade from the connecting road or freeway.
- sliproad - a motorway entrance or exit; ramp. Sliproads are often at a different grade from the connecting road or motorway.