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E18 Muurla–Lohja motorway

A 51.3 km motorway project on Vt 1 between Muurla and Lohja. The developer rounds the two sections to 23 km and 29 km. Muurla–Lahnajärvi opened on 19 November 2008, and Lahnajärvi–Lohja opened on 28 January 2009.

Total length
52 km
Open today
52 km
Sections
2
Cost for the project as a whole
€300Mworks onlyThe Finnish Transport Agency's post-project evaluation reports construction costs of EUR 300 million. No price year is stated.
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Sections

Sections of E18 Muurla–Lohja motorway: status, length, dates, cost, funding and contractors
SectionsStatusLengthTimelineCostFundingContractorsContract terms
Muurla–Lahnajärvi

The project developer reports a 23 km section. The OSM line follows one carriageway between junctions 15 and 18 and measures 24.65 km, 7% above the reported length; the sourced figure is retained.

Opened23 km
  1. Nov 19, 2008Opened
––––
Lahnajärvi–Lohja

The project developer reports a 29 km section. The OSM line follows one carriageway between junctions 18 and 22 and measures 31.19 km, 8% above the reported length; the sourced figure is retained.

Opened29 km
  1. Jan 28, 2009Opened
––––

Related projects

Sources

  1. Finnish Transport Agency: Post-project evaluation of E18 Muurla–Lohjaread Oct 13, 2026
  2. YIT: E18 Muurla–Lahnajärvi section opens, and Lahnajärvi–Lohja works continueread Oct 13, 2026
  3. Yle: E18 partially opens, Muurla–Lahnajärvi sectionread Oct 13, 2026
  4. Yle: E18 motorway open to traffic, Lohja–Lahnajärvi sectionread Oct 13, 2026
  5. OpenStreetMap: Valtatie 1 route relation 9193462read Oct 13, 2026

Figures last checked against their sources in Oct 13, 2026.