|From: Riga||Length 102 km|
Estonian Road 4|
Major cities Riga, Ainaži, Salacgrīva, Saulkrasti
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.