Bulgaria's Road Infrastructure Agency (RIA) said that it has launched a 22.4 million levs ($13 million/11.5 million euro) tender for awarding a contract cor consultancy services related to the construction of six sections of Hemus motorway.The deadline for submitting offers is May 16, the government agency said in a notice on Monday.Bids will be ranked based on price, which will form 60% of the final mark, and technical criteria.Last week, Bulgaria's regional development ministеr Petya Avramova said that construction works on two sub-sections of Hemus motorway will begin in the second half of April.In December, the government allocated 1.35 billion levs ($786 million/690 million euro) to the the regional development ministry for the construction of 134.2 kilometres of Hemus motorway from Boaza road junction some 100 km. east of Sofia to the city of Veliko Tarnovo, in central-northern Bulgaria, divided into six sections. The construction works have been assigned to state-owned civil engineering company Avtomagistrali.Almost 170 km of the motorway that would link Sofia to Varna, on the Black Sea coast, have already been built.Two sub-sections with a total length of some 26 km - from Yablanitsa to Boaza in the western part and from Buhovtsi to Belokopitovo in the eastern part - are currently under construction.