• Main roads – connect the capital with other big cities, link those cities to each other and connect the capital and other big cities to important harbours, railway nodes and border posts.
• Basic roads – connect cities to other cities and to main roads.
• Secondary roads – connect cities to towns and small towns, towns and small towns to each other or to villages and all the aforementioned to main and basic roads.
• Connecting roads – roads meant for bringing traffic together or channelling traffic flows, as well as distributor roads, access roads, ramps or other similar roads that have been built for the safe and smooth operation of an intersection of roads.
• National ice roads – roads that correspond to clause 20 of § 20 of the Traffic Act and that have been added to the list of national roads.
• Other national roads – roads that have been added to the list of national roads, but which do not have the characteristics of the above mentioned national roads.

As of 01.01.2026, the total length of Estonian national roads is 16,990 km, with the addition of up to 87,6 km of ice roads, depending on the weather conditions.

Among national roads, there are a total of 947 km of E-roads and 1,289 km of TEN-T roads.

1603 km (9.4%) of the national roads are main roads, 2,402 km (14.1%) are basic roads, 12,480 km (73.5%) are secondary roads and others national roads and 164 km (1,0%) are ramps and connecting roads, and 341 km (2,0%) walkways.