Are you allowed to increase your speed to 130 km/h beyond this sign?

In the video you are driving on a dual carriageway outside a town; on both sides there are blue signs with a white outline of a car - D-7 "expressway". Beyond this sign you are not allowed to increase your speed to 130 km/h. The answer is: no.

The Regulation on road signs and signals states that sign D-7 "expressway" marks the beginning or continuation of an expressway. The Road Traffic Act sets the speed limit for a passenger car on a dual-carriageway expressway at 120 km/h, and on a single-carriageway expressway at 100 km/h; 140 km/h applies only on a motorway, marked with sign D-9 with the symbol of two roadways and a flyover. Driving at 130 km/h would therefore mean exceeding the limit by 10 km/h. It is worth telling the two signs apart: D-7 has the outline of a car, D-9 - two roadways with a flyover; both are blue and on both roads stopping is prohibited except in designated places; on a motorway the ban on U-turns is absolute, and on an expressway you may make a U-turn only at a junction or in a place intended for this. The limit is an upper limit - in rain, darkness or heavy traffic you drive more slowly, and you keep a following distance from the vehicle in front of no less than half of your speed in metres.

Legal basis: § 48 para. 1 and 2 of the Regulation on road signs and signals; Art. 20 para. 3 point 1 letter a and b, Art. 19 para. 3a and Art. 22 para. 6 point 2 and 3 of the Road Traffic Act (Prawo o ruchu drogowym)