Concessionaire who builds and operates the National Expressway #171 ("Yongin-Seoul Expressway") The Yongin-Seoul Expressway is a 22.9 km, dual two to three-lane tolled expressway consisting of six bridges, 10 tunnels and seven interchanges connecting Youngduck-ri, Yongin City to Segok-dong in Seoul. Yongin-Seoul Expressway eases traffic congestion problem in Suwon-Seoul section of the Seoul-Busan Highway, one of the most heavily travelled expressway. Construction began in October 2005 and was successfully completed on time in June 2009.