Normativas y Políticas para el Transporte Sostenible en Construcción

The transport of materials, equipment, and waste accounts for between 5% and 12% of a building's total lifecycle CO2 emissions, depending on average supply distance, material density, and transport mode (Adalberth, 1997; Merchan et al., 2020). For a typical European residential building of 5,000 m2, material transport generates between 80 and 180 tCO2, equivalent to 16-36 kgCO2/m2 of built floor area. The construction industry moves approximately 3.2 billion tonnes of materials per year in the EU-27, of which 75% are aggregates and concrete, 10% steel and metals, 8% bricks and ceramics, and 7% wood, glass, plastics, and other materials (UEPG, 2023). The average emission factor for road transport with heavy trucks (> 16 t) is 62 gCO2/t km with a Euro VI diesel engine, meaning that transporting 1 tonne of material over 100 km generates 6.2 kgCO2. For low-value materials such as sand and gravel (8-15 EUR/t), the transport cost exceeds the material value beyond 50-80 km, which incentivizes supply proximity and explains why the average distribution radius for aggregates is 30-40 km.

The transport of construction and demolition waste (CDW) adds a significant reverse flow: the 374 million tonnes of annual CDW in the EU require an average of 3-5 truck trips per day with 20 t trucks per medium-sized construction site throughout the demolition and construction phase. In Spain, the average distance between a construction site and a CDW treatment plant is 35 km, but it can exceed 100 km in rural areas with a scarcity of authorized plants, increasing transport emissions by 150-200% and costs by 60-80% compared to areas with adequate infrastructure (GERD, 2022). Construction trucks represent 15-20% of heavy traffic in urban areas and contribute disproportionately to local pollution: NOx emissions from a 26 t Euro VI truck are 0.46 g/kWh, but under real-world urban driving conditions with frequent stops they can triple to 1.2-1.5 g/kWh (ICCT, 2021). In cities like London, construction is responsible for 28% of PM10 emissions and 8% of NOx emissions at the municipal level.

The Euro VII standard (EU Regulation 2024/1257), applicable from July 2027 for new heavy-duty vehicles, sets emission limits of 200 mg NOx/kWh under real driving emissions (RDE) conditions, 56% lower than the 460 mg of Euro VI, and introduces for the first time limits on brake emissions (7 mg/km of PM10) and tires. In parallel, the CO2 Emissions Regulation for Heavy-Duty Vehicles (EU 2019/1242, amended in 2024) requires reductions of 45% in average CO2 emissions of new trucks sold by 2030, 65% by 2035, and 90% by 2040, relative to the 2019 baseline. These targets are binding for manufacturers and require the massive introduction of battery electric trucks (BEV) and hydrogen fuel cell trucks (FCEV) into construction material transport fleets. Volvo Trucks, Daimler Truck, and MAN already market electric trucks of 16-27 t with ranges of 200-350 km, sufficient for 70% of construction material distribution routes that have average distances of 50-120 km (ACEA, 2023).

Low-emission zones (LEZ) and zero-emission zones (ZEZ) in cities directly impact construction logistics. In 2024, 320 European cities operate LEZs that restrict access for polluting vehicles (Urban Access Regulations, 2024). Madrid has banned trucks without an environmental label from circulating in Madrid Central (4.7 km2) since 2022, and Barcelona extends its LEZ to 95 km2 where pre-Euro VI diesel vehicles cannot circulate. London operates the largest Ultra Low Emission Zone in Europe (1,500 km2) with a charge of 12.50 GBP/day for non-compliant vehicles, and plans a pilot ZEZ in the City for 2025 where only zero-emission vehicles will be allowed. Oslo has required since 2025 that 100% of construction machinery on municipal projects be zero-emission (electric or hydrogen). These regulations compel construction companies to renew fleets with investments of 200,000-400,000 EUR per heavy electric truck (versus 100,000-150,000 EUR for an equivalent diesel), but the total cost of ownership (TCO) equalizes at 5-7 years thanks to lower electric energy costs (0.04-0.08 EUR/km versus 0.30-0.50 EUR/km for diesel) and maintenance (40-60% lower).

Load consolidation in construction consolidation centres (CCC) reduces the number of trips to the construction site by 30% to 68% and transport emissions by 40% to 75%, according to the evaluation of 15 pilot projects in London, Stockholm, and Amsterdam (Transport for London, 2019). A typical CCC operates in a 3,000-10,000 m2 warehouse on the urban periphery, receives deliveries from multiple suppliers, consolidates loads by destination and schedule, and distributes to surrounding construction sites with optimized routes in fully loaded trucks (85-95% utilization versus 40-55% for direct deliveries). The CCC for the London Bridge Quarter project (The Shard) consolidated 120,000 deliveries over 5 years, eliminating 68,000 truck trips to central London and reducing transport emissions by 64%. In Stockholm, municipal regulation has required the use of CCCs for all construction sites in the Norra Djurgardsstaden district (12,000 new dwellings) since 2018, with a verified 42% reduction in transport emissions compared to sites without consolidation.

Alternative transport modes to trucking offer additional significant reductions. Waterway transport emits 17 gCO2/t km, 73% less than heavy trucks (62 gCO2/t km), and is viable for bulk materials (aggregates, cement, steel) in cities with waterway access. In London, Thames Tideway uses 400 barges per year to transport excavated material along the Thames, avoiding 300,000 truck trips and 19,000 tCO2. Rail transport (22 gCO2/t km) is competitive for distances exceeding 300 km: CEMEX transports cement by rail from its plants in Alicante and Mallorca to distribution terminals in Madrid and Barcelona, reducing emissions by 65% compared to road transport. Supply proximity is the most direct strategy: specifying local materials (radius < 100 km) reduces transport emissions by 50-70% compared to imported materials. Certification systems such as LEED award credits for regionally sourced materials (radius < 160 km for heavy materials), and France's RE2020 regulation includes transport in the mandatory embodied carbon calculation, effectively incentivizing proximity.

The regulatory horizon points toward the progressive elimination of transport emissions in construction. The revision of the Combined Transport Directive (2023) promotes road-rail-waterway intermodality with tax exemptions and support for intermodal terminals, targeting the transfer of 30% of road freight traffic to sustainable modes by 2030 for routes exceeding 300 km. National integrated energy and climate plans (NECP) of member states include specific targets for freight transport: Spain foresees that 14% of trucks sold in 2030 will be zero-emission, compared to the current 0.3%. At the project scale, life cycle assessment (LCA) tools such as OneClick LCA and Tally enable the quantification and optimization of material transport emissions during the design phase, considering real distances from factories to the construction site and selecting suppliers that minimize the logistics footprint.

The technological transition of construction fleets is advancing at uneven speed. Electric trucks of 16-27 t already operate in 18 European countries, with 8,700 units sold in 2023 (2.8% of new heavy vehicle registrations), a 70% increase over 2022 (ACEA, 2024). Electric construction machinery (excavators, loaders, dumpers of 1-30 t) represented 4% of global sales in 2023 and will reach 15-20% by 2028 according to Off-Highway Research. Volvo CE has marketed electric excavators of 6-30 t since 2022, with performance equivalent to diesel and energy costs 70-80% lower. On-site charging infrastructure is evolving from portable diesel generators toward charging stations powered by photovoltaics plus battery, with capacities of 150-350 kW that allow charging a heavy truck in 1-2 hours. Regulation, fiscal incentives, and pressure from urban LEZs converge to make the transition toward decarbonized construction logistics irreversible, with the additional cost estimated at 2-5% of total project budget, offset by savings in urban access charges, fuel, and maintenance.