In brief
The Road Infrastructure Agency announced that trucks over 12 tonnes will be prohibited from a 47‑kilometre stretch of the Hemus Motorway on three dates in November, with alternative mountain routes provided. The repairs aim to restore full service by mid‑December, followed by a second phase of restrictions beginning in January 2027 until completion in April 2027. The move is part of a broader strategy to maintain safety and reduce emissions by redirecting freight traffic through lower‑intensity corridors.
Heavy goods vehicles weighing more than 12 tonnes will be barred from a 47‑kilometre segment of Bulgaria’s Hemus Motorway between the Sofia exit and the Botevgrad road junction on three November dates, the Road Infrastructure Agency (RIA) announced on 11 January 2027. The restrictions relate to major repairs underway in the Topli Dol Tunnel, a critical artery linking the capital to north‑west Bulgaria and beyond into the Balkans.
On Friday, 13 November, trucks moving out of Sofia will be prohibited between 3 pm and 9 pm. Sunday, 15 November will see a restriction on vehicles traveling towards Sofia from 2 pm to 9 pm. On Monday, 16 November, heavy‑truck traffic will stop in both directions from 7 am to 9 am. These windows match the busiest periods of the motorway, indicating careful planning to minimise network disruption.
Traffic between kilometre 0 and kilometre 47 will remain open only for vehicles 12 tonnes or less, the RIA said. Authorities have also set up alternative routes for the affected freight, largely through the Petrohan Mountain Pass and along the second‑class road II‑16, linking Sofia, Svoge, and Rebrovo. These back‑up corridors were selected to manage traffic loads and preserve the imposed curfew’s safety objectives.
According to RIA officials, the Topli Dol Tunnel has suffered significant wear in its inner skeleton, moisture ingress and concrete cracking. “The repairs need to be carried out at high quality to prolong the tunnel’s life and protect the safety of millions of motorway users,” the agency said. The planned work covers both tunnel tubes, with full service expected to resume around 18 December, just in time to keep traffic moving before the Christmas and New Year holidays.
After the holiday period, the agency anticipates a re‑application of restrictions that will commence on 11 January 2027, focusing on the tube leading towards Sofia. These restrictions will persist until the final completion of the work, scheduled for April 2027. In parallel, a two‑kilometre segment of the Trakia Motorway in the Sofia region will undergo partial repairs, requiring temporary traffic adjustments from the 13th of November to the 17th of November.
Such directed measures are a core element of Bulgaria’s national strategy to upgrade key transport infrastructure while maintaining public safety. By limiting access for heavy‑goods vehicles during intensive repair periods, the RIA hopes to minimise risk of accidents that could arise from compromised tunnel structure or road surface conditions.
Environmental and logistical implications of the restrictions have already been highlighted by local stakeholders. Researchers in the Bulgarian Association for Transport Sustainability point out that diverting heavy freight to mountain passes could shift emissions patterns. While traffic on the alternate routes will increase, the RIA claims that these corridors are characterised by lower vehicle densities and smoother gradients, which may reduce fuel consumption per kilometre.
According to the Environmental Protection Agency’s latest traffic model, a 15 % increase in vehicle kilometres on the Petrohan route could translate into an equivalent 2 % rise in average CO2 emissions for trucks, compensating for the reduced load capacity and extended travel distances. The RIA argued that the combined approach—traffic staging, limited‑weight curfews, and usage of lower‑intensity routes—offers a balanced solution between infrastructure safety and environmental stewardship.
Industry representatives from the Bulgarian Federation of Freight and Logistics have expressed support for the timing of the restrictions, noting that “the traffic windows have been designed around peak freight holiday demand.” They also urged authorities to keep the alternate routes paved and signposted, to prevent accidental stationary congestion that could worsen emissions in the mountains.
As the project advances, the RIA will employ continuous monitoring devices in both tunnel tubes, measuring air quality, structural stresses and traffic volume. “We will release real‑time data to the public through a dedicated portal,” the agency said. Said analyst journalist and environmental activist Evgeni Mitkov: “Transparency will be key to managing public expectation and environmental accountability during this operation.”
Government officials have pledged to optimise the repair schedule to reduce the total duration of any curfew. They indicated that any early completion will allow normal heavy‑goods traffic to resume ahead of the impending schedule, with full clearance expected by April 2027. The planned deadline, corroborated by the RIA, matches the Bulgarian Infrastructure Development Programme’s 2025‑2027 strategic objectives for multi‑modal network resiliency.
During periodical traffic updates, the RIA mentioned that if overall traffic volumes fall below projected thresholds, authorities might lift the restrictions earlier. The management level will monitor real‑time data and weather forecasts to decide on any early releases, ensuring safety is not compromised by unanticipated traffic conditions.
With the Topli Dol Tunnel at the centre of a broader Bulgarian strategy for sustainable transport, the temporary measures on the Hemus Motorway demonstrate how precautionary traffic planning can mitigate accidents and environmental impact. The RIA’s alignment with both national safety priorities and public‑interest advisory groups underscores the dual focus on infrastructural integrity and ecological protection that shapes transport policy in the region.
