Bulgaria's Plovdiv municipality said on Thursday that it has opened a tender for awarding a contract for construction of a road underpass in the city's southwest, worth an estimated 9.9 million levs ($5.6 million/5.1 million euro), VAT excluded.The underpass will go under the Sofia-Plovdiv railway line, the municipality said in a tender notice.The deadline for submitting offers is November 19.Bids will be ranked based on price, with 70% weight, and technical criteria.