November 3 (SeeNews) - A tie-up comprising Bulgarian-registered Patstroy Burgas, Set Company, Burgaspatstroy, Infra Expert and Strabag EAD started works on the overhaul of a 6 km long section of Rusokastro-Troyanovo road in Burgas region, a project worth 5.2 million levs ($3.1 million/2.7 million euro), the Road Infrastructure Agency said.