The investment includes, among others: construction of the Kluczbork bypass from km 6 + 523.15 to 7 + 901.38(total length of the 1.37 km section) with 2x3,25 m wide roadway and bilateral groundsides 2x1,50m wide, construction of switches to the designed roundabout at the junction DK 42 in m. Kluczbork ul. Byczyńska, construction of a road viaduct over the PKP tracks, construction and reconstruction of road culverts, construction of economic roads, construction of downhills to fields, construction of rainwater drainage, construction of pavements and bicycle line, construction of lighting, transmission and security of existing energy networks, construction of technological canals, construction of road ditches. The projected section represents the fourth stage of the construction of the Kluczbork ring road. The beginning of stage IV refers to national road No 42 in Ligota Dolna by a roundabout crossroad, while the end of the section refers to national road No 42 in Kluczbork (ul. It is a crossroads of a roundabout type. The bypass leads directly to the investment areas – the Wałbrzych Special Economic Zone INVEST-PARK Subzone. Wałbrzych Special Economic Zone is one of the largest and most dynamically developing zones in Poland. The area around Ligota Dolna is an area where many companies from different industries have its headquarters. The construction of a new road will make it much easier for entrepreneurs to run their business, develop it, as well as provide access to new areas where new businesses can be built.The planned investment in Kluczbork is aimed at comprehensive construction of a new road in order to ensure convenient access to investment areas and to improve the safety of all road users using this route. Products of the project: Length of built communal roads – 1.37 km.