Traffic monitoring could be, but i see no reason for using it around where i worked, in the 3 years i was there the freeway was only partially blocked at one time for a fjew houres, and there is plenty alternative routes to that adress no matter witch direction you come from.
To my knowlege the only Places where trafic back up on a regular basis her in DK is, around Copenhagen, and around a town called Vejle in Jutland. but the Vejle issue should be over quite soon due to massive freeway expansion and re-routing in that area.
The Copenhagen issue will proberly never get resolved as there is too many dumbasses that live and work in that hell hole. 😛
Then offcourse there is allso the fjew days during the year when Things get slowed Down a little due to holliday traffic, but its no suprice , and could be overcome quite easy by leaving home in good time or drive around the fjew known problematic spots. ( chek interweb for road Works and have traffic announsements ON in your radio in the car ).
Driving around a traffic jam in Denmark is no problem, we are a quite small country with plenty of roads.
A permanent installation of a GPS nav unit in a car would be stupid, cuz we are blessed with so many Eastern European "turists" that love to take a "free" nav unit when they leave for home. ( stolen Things get shipped out east in cars - trucks and containers )
The rule is never leave anything in your car you are not willing to Loose. cellphones and nav-units are gone within seconds.