Review Article
2 + 1 Highways: Overview and Future Directions
Table 2
Comparison of international 2 + 1 roadway cross sections.
| Country | Median barrier | Width (m) | Single-lane | Two-lane | Paved shoulder | Median | Total paved |
| Swedish MML [10] | Yes | 3.75 | 3.25 | 0.50 | 1.75 | 13.00 | Swedish MLV [10] | Yes | 3.25 | 3.25 | 0.75 | 1.00 | 12.25 | German EKL1 [14] | No | 3.50 | 3.25–3.50 | 0.50–0.75 | 1.00 | 15.50 | German EKL2 [14] | No | 3.50 | 3.25–3.50 | 0.50–0.75 | 0.50 | 15.00 | Finland [21] | Yes | 3.75 | 3.25–3.50 | 0.90–1.25 | 1.70 | 14.35 | Finland [21] | No | 3.75 | 3.25–3.50 | 1.25 | 0.00 | 13.00 | Denmark [27] | No | 3.75 | 3.50–3.75 | 0.50 | 1.00 | 13.00 | Norway [28] | Yes | 3.50 | 3.25 | 0.75–1.50 | 2.50 | 14.75 | Ireland [8] | Yes | 3.50 | 3.50 | 0.50–1.00 | 1.00 | 13.00 | Ireland [8] | Yes | 3.25–3.50 | 3.50 | 0.50 | 1.00 | 12.25 | United Kingdom [32] | No | 3.50 | 3.50 | 1.00 | 1.00 | 13.50 | United Kingdom [32] | No | 3.50 | 3.50 | 1.00 | 0.75 | 13.00 | South Korea [15] | No | 3.50 | 3.25 | 1.50 | 1.50 | 14.50 | South Korea [15] | No | 3.50 | 3.25 | 1.50 | 0.50 | 13.50 | France | Yes | 3.00 | 3.00 | 1.50 | 1.50 | 13.50 | France | No | 3.25 | 3.25 | 0.50 | 1.00 | 12.50 | Poland [22, 33] | Yes | 3.50 | 3.50 | 1.00 | 0.50 | 13.00 | Poland [33] | No | 3.50 | 3.50 | 1.00 | 0.50–1.00 | 13.00–13.50 | Spain [12] | Yes | 3.50 | 3.20 | 1.00–1.50 | 1.60 | 14.00 | Spain [23] | Yes | 3.50 | 3.25–3.50 | 1.50 | 1.00 | 14.25 | Japan [38] | Yes | 3.25 | 3.25 | 1.00 | 1.25 | 13.00 | Texas, US [39] | No | 3.35–3.65 | 3.35–3.65 | 0.90–3.00 | 0.00 | 11.85–16.95 |
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