Estonian national road 4

Põhimaantee 4 (ofcl. abbr. T4; also known as Pärnu Highway) is a 192-kilometre long north-south national main road in Estonia. The route follows the same path as the European route E67, also known as the Via Baltica. The highway starts in Tallinn. From there the main cities passed are Saue, Märjamaa and Pärnu. The highway ends in Ikla at the Latvian border.
The road forms a major transport north–south transport route between Estonia and Central/Western Europe. In 2015, the highest traffic volumes were around Tallinn, with the AADT there being around 31 000. These are the highest figures in Estonia. The figures rise again around Pärnu, hovering around 10 000.
The road is a dual carriageway for 14,1 kilometres. The section is between Laagri and Ääsmäe. The section between Ääsmäe and Kernu will be expanded to 2+1 in 2016–2017. Another section to be expanded is between Jänesselja and Nurme, also to be expanded to 2+1.
Route description.
The T4 is a major north–south highway in Estonia connecting the capital of the country, Tallinn, to the fourth largest city in Estonia, Pärnu, and ultimately the Latvian border (where the Latvian A1 continues to Riga). The T4 is a part of the European route E67, also known as the Via Baltica.
The route bypasses all cities and towns, only having a 13-kilometre stretch in Tallinn. The highway begins in Tallinn from Viru Väljak and runs through the city for 13 kilometres. In the city, it intersects with the T8 at Vabaduse väljak and the T15 at Järve. Shortly after crossing city borders, the road turns into a dual carriageway and interchanges with the T11 at Saue. At kilometre 27, the road meets with the T9 and turns into a 1+1 road. The road continues in a straight, southbound manner until Pärnu.
At Pärnu, the road turns left onto the Pärnu bypass (with a 70 km/h speed limit). The road has an intersection with the T5 here and crosses the Pärnu river. After this, the road turns left again, and shortly after Pärnu intersects with the T6. Afterwards the route follows the Estonian coast until Ikla, where the Latvian border is crossed and the road continues as the A1 in Latvia.
Currently there are 11 speed cameras on the T4, between kilometres 92 and 141.