Motorways (autoroutes الطرق السيارة) are major roads designed for high-speed vehicular traffic, often with controlled access and tolls. Their speed limit is maxspeed=* is 120 km/h and their ref=* starts with A.
Road signs on A3, 6 km from Amskroud and 195 km from Marrakesh.
ref=*: the reference of the motorway, e.g. A1, A2. (note—ADM classifies the references as follows: odd numbers for motorways going north-south, e.g. A1 from Rabat to Safi, and even numbers for motorways going west-east, e.g. A2 from Rabat to Oujda).
oneway=yes: all motorways are physically divided, meaning each carriageway goes in one direction.
maxspeed=*: the speed limit, as displayed on signs. Note that the speed limit is generally 120 km/h, but it can sometimes be reduced to 100 or 80 depending on the signs.
destination=*: name of the town/cities in the direction of the motorway, as displayed on signs.
toll=yes (or toll=no): in most parts, a toll is required to use the motorway, meaning it is necessary to go through a toll booth before (or after) using it. However, some parts do not require paying to use them. That is especially the case near cities (e.g. you don't pay a toll to go from Casablanca to Bouskoura).
ref=*: use this tag on the nodes of the exits to precise their reference. These are numbers written on the signs beforehand that display the names of the cities/towns/roads of destination.
destination=*: use this tag on the nodes of the exits to precise the names of the cities/towns/roads of destination when taking this exit, as displayed on the signs.
destination:ref=*: use this tag on the exit nodes if it's a junction with another road that has a reference, e.g. A3, RN8.
junction:ref=*: the exit's reference. This is the same number as the exit node's ref=* beforehand.
destination=*: use this tag on the ways of the exits to precise the names of the cities/towns/roads of destination when taking this exit. Same as the node's destination=* beforehand.
destination:ref=*: use this tag on the exit ways if it's a junction with another road that has a reference, e.g. A3, RN8.