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|---|---|---|---|---|
| Droga ekspresowa S12 | ||||
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| Route information | ||||
Part of  E373 | ||||
| Length | 89.3 km (55.5 mi) plus 8.6 km single carriageway, 315 km (196 mi) planned | |||
| Major junctions | ||||
| West end |  A 1 near Piotrków Trybunalski | |||
| East end | Ukrainian border at Dorohusk | |||
| Location | ||||
| Country | Poland | |||
| Regions | Łódź Voivodeship, Masovian Voivodeship, Lublin Voivodeship | |||
| Major cities | Radom, Lublin | |||
| Highway system | ||||
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Expressway S12 or express road S12 (in Polish droga ekspresowa S12) is a Polish highway planned to run from a junction with the A1 highway near Piotrków Trybunalski to a border crossing with Ukraine at Dorohusk, passing by Radom, Lublin and Chełm. The completed road should be about 328 km (204 mi) long.
As of 2024 the section open to traffic runs from Puławy through Lublin to Piaski. The expressway from Piaski to the border with Ukraine is under construction, set to be opened in early 2025 (the bypass of Chełm) and in early 2027.