Five out of six of these junctions have automatic detecting systems with variable electronic road signs implemented which indicate a lower speed limit (usually 110 km/h instead of 130 km/h in summer time) if a U-turn or surrounding infrastructure is being used (excluding transit traffic of A2 highway).

One section with an U-turn, but without this system has standard signs with the lowered speed limit of 110 km/h.

[1] Agricultural vehicles cannot enter either the main road or the U-turns just to get to the other side since motorway signs are implemented near the junctions which restrict entry for any agricultural or slow vehicle.

The most notable event in the highway was the peaceful political demonstration of the Baltic Way during the Singing Revolution in the late 1980s.

Approximately two million people joined their hands to form a human chain spanning 675.5 kilometres (419.7 mi) across the three Baltic states then being part of USSR.