Question: The European route E67 and the Estonian national road 4 are both forms of what?
Context: The A3 is a national road in Latvia connecting Inčukalns to Estonian border in Valka.  The road is part of European route E264, and part of TEN-T road network of Latvia.  After the border, the road turns into Estonian National Highway 3, which leads to Jõhvi in northeastern Estonia.  The length of A3 in Latvian territory is 122 kilometers.  The road leads through the scenic Gauja National Park.  Currently A3 has 1x2 lanes in full length.  A3 bypasses Valmiera, which is one of the biggest cities in Latvia.  There aren’t any plans to widen it in near future.  Almost half of A3 was reconstructed in 2012.  Speed limit is 90 km/h.  The avarege AADT on A3 in 2015 was 5317 cars per day. European route E 67 is an E-road running from Prague in the Czech Republic to Helsinki in Finland by way of Poland, Lithuania, Latvia, and Estonia.  It goes via Prague, Wrocław, Warsaw, Kaunas, Panevėžys, Riga, Tallinn and Helsinki. European route E 265 is a B-class E-road, part of the inter-European road system.  It connects Tallinn, Paldiski, and from Paldiski on ferry to Kapellskär.  In Estonia, E 265 follows the Estonian National Road 11 (Tallinn Ring Road) and part of Estonian National Road 8 (from Keila to Paldiski).  In Sweden, it continues as European route E18 The A5 is a national road in Latvia which is part beltway around Riga, connecting Salaspils to Babīte.  The road is also known as Riga bypass.  The road is part of European route E67, European route E77 and Latvian TEN-T road network.  The length of A5 is 41 kilometer.  Currently A5 has 1x1 lanes until interchange with A9 then it turns to 2x2 all the way until Babīte.  Most of the traffic on A5 is made up by trucks. A5 crosses river Daugava on Riga HES, and the A5 part on the HES has been reconstructed in 2010/2011.  Another part of A5 between A8 and A9 was reconstructed in 2011.  There are plans to build a new bridge over Daugava opposite to the end of A4 (part of Riga bypass on other side of Daugava), in further future.  Current speed limit is 90 km/h.  The average AADT of A5 in 2016 was 12 482 cars per day. Põhimaantee 4 (ofcl.  abbr.  T4) 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 A7 is a national road in Latvia connecting Riga to the Lithuanian border (Grenctāle), through Bauska.  The road is also known in Latvia as the Bauska Highway.  The A7 is part of European route E67 (also known as the Via Baltica) and the European TEN-T road network.  The road becomes the Lithuanian A10 at the border.  The length of the A7 in Latvian territory is 86 kilometers.  Currently the A7 has 2x2 lanes only within the territory of Riga, other parts have 1x2 lanes.  The current speed limit is 90 km/h except within municipalities.  In period of 2005 - 2006, the A7 was reconstructed from the 25th until the 43rd kilometer and from the 67th until the 85th kilometer.  A 2 kilometer stretch of the road was reconstructed in Iecava, and reconstruction of another 15 kilometer long stretch was finished in 2012.  Construction of the Ķekava bypass is planned to begin in 2017.  The bypass will be built to expressway or motorway standards.  The average traffic (AADT) on the A7 during 2016 was 14,599 cars per day. National road 4 (Polish: "Droga krajowa nr 4" ) is a route belonging to the Polish national road network.  The highway connects the southern regions of Poland.  It runs from Zgorzelec at the German border to Korczowa at the Ukrainian border, as the A4 motorway.  National road 4 is a component of European highway E40. The A4 is a national road in Latvia which is part of the ring road around Riga, connecting Baltezers to Saulkalne.  The road is also known as the Riga bypass.  The road is part of European route E67, European route E77 and Latvian TEN-T road network.  The length of the A4 is 21 kilometers.  Construction on A4 was started in 1964 and finished in 1980.  Currently the A4 has 1+1 lanes in all its length.  In 2011/2012 part of the A4 was reconstructed, and its planned that around year 2020 widening of the road to 2x2 lanes will start.  Because of this, it would receive an expressway or motorway status, and the current 90 km/h speed limit would be raised.  The average AADT of A4 in 2016 was 11 954 cars per day. Finnish national road 8 (Finnish: "valtatie 8" , Swedish: "riksväg 8" ) runs along the western coast of Finland.  The road starts at Turku, continues to Vaasa and ends in the intersection with Finnish national road 4 in Liminka, 25 km south of Oulu.  It constitutes much of the length of European route E8.  Cities along the road are Rauma, Pori, Kristinestad, Närpes, Vaasa, Nykarleby, Kokkola and Raahe.  From Liminka, the road continues to the same direction to Oulu as road 4; road 4 to Liminka intersects it from the left. The A1 is a national road in Latvia connecting Riga to Ainaži.  The road is part of the European route E67 and the Latvian TEN-T road network.  Ainaži is Latvian community on the border with Estonia and north of Ainaži the road then becomes Estonian National Road 4.  The A1 was almost completely reconstructed between 2003 and 2007.  The Saulkrasti bypass was also built (prior to 2007 all A1 traffic ran through the 17 kilometre long coastal town.)  The road was completely reconstructed from Riga to Salacgrīva, the 80 kilometre long stretch was also widened, with wider verges.  The official speed limit of A1 is 100 km/h in summer and 90 km/h in winter.  The A1 is part of the Via Baltica, which runs from Estonia to Poland.  The average AADT on the A1 in 2016 was 10655 cars per day.
Answer: highway