Transport of equipment for civil works and rail: TBM segments, beams, switches and crossings, and heavy machinery

Catalonia enters the second half of 2026 with four major rail construction fronts active simultaneously and a delivery horizon stretching to 2032. The L9/L10 TBM Hospi is boring Mandri-Lesseps, the L8 FGC starts boring in June, La Sagrera enters the fit-out phase, and the Mediterranean Corridor extends standard gauge from Castellbisbal to València.

Catalonia enters the second half of 2026 with four major rail construction fronts active simultaneously and a delivery horizon stretching to 2032. The L9/L10 TBM Hospi is currently boring the 1.6 km remaining between Mandri and Lesseps with an estimated advance of 130 m per month; the L8 FGC extension between Plaça Espanya and Gràcia starts boring in June 2026 with four kilometres of single-tube tunnel ahead; La Sagrera completes its civil works between the end of 2026 and the start of 2027 and enters the fit-out phase and the central roof structure until a public opening forecast for 2031–2032; and the Mediterranean Corridor extends standard gauge from Castellbisbal to València with three sections active simultaneously. Add the comprehensive transformation of the La Llagosta logistics complex, the drafting of the project to extend Line 1 to Badalona, and the expansion of Sants, which enters its second phase. Behind each of these fronts there is a continuous flow of singular cargoes for the next four years: precast beams for viaducts and station roofs, complete switches and crossings, traction substation transformers, steel structure for station roofs, drive segments and TBM replacements. This article is addressed to the project logistics manager looking at the four-year construction schedule and needing to decide how, by which route and under which authority those pieces reach the work front.

The Catalan civil-rail wave 2026-2030

Four main fronts and several secondary ones concentrate the flow of singular cargoes forecast for the next four years in Catalonia.

La Sagrera, fit-out phase and closing of the central roof. With €1.27 billion already contracted and an additional €350 million pending final approval for the specific station project, the works enter between 2026 and 2027 the phase in which the logistics flow changes nature: heavy civil works give way to fit-out. The central roof structure on the Sagrera side — one of the engineering milestones still pending — requires modules of great length and singular geometry. The definitive switches and crossings, the traction substation transformers, the signalling systems and the electrification equipment arrive in sequence during 2026–2028. On the ZTTT (Train Technical Treatment Zone, 600 m, 10 tracks, 5 platforms) four tracks already operate and commissioning of the fifth is being completed; the remaining ones enter service during 2026. Full public opening is not forecast before 2031–2032.

L9/L10 Barcelona metro, central trunk. The Hospi TBM (100 m long, more than 12 m in diameter, 2,300 t) is currently boring the last kilometre and a half of tunnel between Mandri and Lesseps, with advance conservatively estimated at 130 m per month due to the geology of the section (slates, sandstones, conglomerates). Boring completion is forecast for summer 2026. From there, the flow shifts to the equipping of the stations entering service in phases between 2027 and 2032: Guinardó-Hospital Sant Pau, Maragall, La Sagrera and La Sagrera-TAV operational in 2027; Lesseps and Camp Nou in 2030; Campus Nord, Sarrià, Mandri and Sanllehy in 2031; Manuel Girona and El Putxet in 2032. Each station means its own chain of singular equipment: transformers, ventilation equipment, industrial escalators, deep drainage systems. Budget of the central section for the Generalitat: €926 million; the L9/L10 total comes to €6.271 billion, with €1 billion executable between 2025 and 2032.

L8 FGC, Plaça Espanya–Gràcia extension: the most active front of the next four years. Four kilometres of single-tube tunnel — both tracks in a single bore, except for an initial section —, three new stations (Hospital Clínic, Francesc Macià, Gràcia) and refurbishment of the current Plaça Espanya and Gràcia. Total investment estimated at €412–430 million, with financing backed by an EIB line. The TBM is already assembled in the launch shaft at Gran Via and starts boring in June 2026. From that date and over several years, a continuous flow of cargoes sustains the works: tunnel segments in conventional convoys outside the scope of special transport, but also TBM spare parts, substation transformers, the structure for the three stations, fit-out equipment, ventilation systems. Opening is on the 2030 horizon.

Mediterranean Corridor, three active sections. The great Catalonia–Comunitat Valenciana connection axis advances with three fronts under simultaneous construction during 2026–2027: third-rail (mixed gauge) installation in the Castellbisbal-Vilaseca section, with several tens of millions of euros executed in 2025, connecting the Barcelona industrial area with southern Catalonia; the Castelló-Vandellòs-La Boella section with fastenings and rail (€3.4 million in a recent contract, within the final phase of the route) to activate standard gauge between Castelló and Tarragona; and the mixed-gauge adaptation Castelló-València with third-rail installation and electrification, with more than €35 million executed in 2025. In parallel, the Ministry activates the accesses to the Port of Castelló with more than €40 million. Commissioning of the Mediterranean Corridor between València and Tarragona has been set for 2027 according to the latest official timetables.

Add to these the complementary fronts: the comprehensive transformation of the La Llagosta logistics complex, with more than €100 million mobilised and the first phase in service since January 2026; the drafting of the project to extend Line 1 to Badalona; and the expansion of Sants, which completes its first phase in 2026 and enters drafting of the next. For the special-transport operator, these are not five works: they are a continuous sequence, year by year, until 2032.

What is transported to civil works and rail

The equipment entering a modern rail works divides into differentiated families, each with its own logistics and threshold of criticality.

• TBM components and spare parts. The cutter head — critical piece — measures between 8 and 13 metres in diameter depending on the machine model and usually weighs between 80 and 200 tonnes, with extreme cases above 230 tonnes. Transported as a single piece, not broken down. The drive head and the main shield are equally bulky assemblies. But the TBM flow does not end with assembly: throughout the machine's operational life come spare parts — main bearings, complete hydraulic systems, back-up sections and, over time, new cutter heads when geology wears the existing one. For the TBMs of L8 FGC (boring from June 2026) and L9/L10 (boring active until summer 2026), this flow is continuous.
• Precast beams. For viaducts, station roofs and platform structures. Usual lengths 20 to 40 metres, weights between 30 and 80 tonnes per unit. The longest beams — the case of the 35 m units that will cover sections of the Mediterranean Corridor between Castelló and València — require extendable platforms with controlled overhang and, frequently, a complementary circulation authorisation in the specific category.
• Switches and crossings (turnouts, crossovers, diamonds). Each complete assembly weighs between 30 and 80 tonnes depending on design — simple turnouts stay in the low range, crossovers, ladders and complex diamonds reach the high end —, transported pre-assembled from factory and treated as an indivisible unit. Breaking them down means losing the factory-calibrated geometry. The full set of definitive switches and crossings for La Sagrera and for the Castellbisbal-Vilaseca section arrives during 2026–2027.
• Steel structure for station roofs. The central roof structure on the Sagrera side, pending closure, is made of modules of great length (up to 25 metres per element) and singular geometry. Long cargoes, not extremely heavy, but with dimensions that trigger ACC and, in urban accesses, itinerary modification. Same profile for the three new L8 FGC stations during 2027–2029.
• Traction substation transformers. For electrification of rail lines. Usual capacities 40 to 100 MVA, weights 80 to 150 tonnes. The transport profile is the same as a transformer for an industrial power plant, a logistics chain this category shares almost entirely with hydrogen and regasification projects.
• Large construction machinery. Large-tonnage excavators (50 to 90 t), tamping machines, dynamic stabilisers, ballast regulators, portable concrete plants, dismountable tower cranes. Arrive on site in transport configuration (partially dismantled) and require, in addition to the main transport, separate transport of boom, counterweight and auxiliary elements.

Alongside these families circulate conventional traffic flows that are not within PASTOR's scope: tunnel segments for tunnel lining — thousands of units of 2 to 5 tonnes per segment, several per ring, tens of thousands per complete tunnel — move in convoys of several conventional trucks from a Catalan precast plant to the tunnel front, and constitute the standard conventional transport flow of rail civil works, where carriers with dedicated fleets and scale compete. The same applies to sleepers, ballast and generic catenary elements. Special transport begins where that conventional flow ends: at the singular piece whose delivery blocks or unblocks the schedule.

Why this flow activates special transport

Mass, geometry and indivisibility trigger the regime. A TBM cutter head of 9 metres diameter and 150 tonnes comfortably crosses the thresholds of Anexo IX del RGV. A precast beam of 35 metres crosses them by length. A complete switch and crossing of 40 tonnes — even more modest in figures — activates them by the combination of mass and dimensions of the assembly when it travels on its transport support.

Indivisibility is structural in this cargo family. A cutter head is not broken down because its value lies in the manufacturer's factory calibration (the case of Herrenknecht in Germany, Robbins in the United States, NFM Technologies in France, Terratec in Australia). A prestressed precast concrete beam does not allow cutting without invalidating its structural calculation. A switch and crossing arrives assembled so that its exact geometry — curve radii, rail separation, switch alignment — can be verified before final installation.

The operational consequence: the Complementary Circulation Authorisation (ACC), in specific or exceptional category according to the parameters of the combination, is mandatory. ACC administration falls to the DGT when the itinerary is inter-regional — the usual case in Catalan projects with equipment imported from Europe — and to the Catalan regional administration through the SCT when the itinerary runs entirely within Catalonia.

The chosen equipment depends on the dominant parameter of the combination. A 35 m, 50 t precast beam travels on an extendable platform with gooseneck; a 150 t cutter head requires a hydraulic modular with axle redistribution; a 110 t traction substation transformer sits typically on 12–14 axle lines. In final accesses to urban works — typically in consolidated Eixample for the L8 FGC, or on an open works plot for La Sagrera — self-propelled SPMT transport can come into play for millimetre-precision manoeuvres.

Equipment, escort and authority: how delivery is prepared

Three parameters, each with its threshold and its administrative consequence, define the transport configuration and the accompaniment regime. Best to treat them separately, because they trigger different obligations that often get confused in practice:

Combination width. When the width exceeds 3 metres, the piece travels with a private pilot vehicle under Anexo XIII de la Instrucción 16/V-90 of the DGT. When it exceeds 5 metres, Anexo III del Reglamento General de Circulación requires accompaniment by authority officers: Agrupación de Tráfico de la Guardia Civil (ATGC) in the DGT's competence area, Mossos d'Esquadra on Catalan stretches. The accompaniment authorisation is requested at least 72 hours before the start of the trip.

Cargo overhang. When the rear overhang of the cargo exceeds 3 metres — a common case in long precast beams and some TBM components — the regulation requires a feasibility and road-safety study endorsed by a chartered engineer, filed with the ACC application. The study is not a minor procedure: it documents the itinerary point by point, the foreseen conflict points, the photographs of critical junctions and the measures proposed to ensure fluidity and safety of circulation. The overhang threshold does not by itself trigger officer escort or self-escort regime; it triggers the study.

Self-escort regime. Self-escort is a specific regime — not automatic — in which accompaniment by authority officers can be replaced by private pilot vehicles on itineraries previously authorised for it by the Subdirección General de Movilidad y Tecnología of the DGT. It requires a specific application, a study for combinations meeting the requirements to circulate under self-escort, and itinerary availability in the catalogue of authorised stretches. It is an option for some habitual itineraries, not an automatic consequence of overhang or width.

Mass and axle distribution. A 150 t, 9 m-diameter cutter head sits on a hydraulic modular with a specific platform for circular pieces, frequently with a double-cradle configuration that distributes mass against the centre of gravity. The 110 t traction substation transformer is distributed over 12–14 axle lines. Switches and crossings, more modest in mass but geometrically complex, require a platform with special structural support to avoid deforming the factory-calibrated geometry of the assembly.

Inter-regional itinerary. The flow of imported equipment for Catalan rail construction enters mainly by two routes: the Mediterranean Corridor from the French border (AP-7 south from La Jonquera) and the Ebro Corridor from Aragón (AP-2 east). For cargo arriving by sea — a frequent case for TBM components and spare parts from northern European or Italian ports, and for beams and precast elements from Italy — the Port of Barcelona and the Port of Tarragona are the usual entry points. In either case, ACCs are filed in jurisdictional blocks — DGT for inter-regional itineraries, SCT for exclusively Catalan stretches — and must be synchronised so that the piece does not stop at a regional border with no current permit in the next jurisdiction.

For equipment entering through the Port of Barcelona — TBM components and spare parts on Mafi trailers from Germany or Italy, prefabricated modules, traction substation transformers — the port-specific regime is added: Special Circulation Authorisation processed through the port's Centro de Servicios al Transporte, port police escort for internal movements, and coordination with quay planning and access gate.

For the crossover flow between energy works and rail works — the case of the traction substation transformer, whose logistics chain is practically identical to that of a rectifier transformer in a hydrogen plant — the operator capitalises on the same itinerary and equipment-configuration knowledge.

The real bottleneck: access to the urban works site

The tunnel schedule is measured in rings. Each ring, in hours of transport.

Catalan rail works under way until 2030 share a structural common denominator: they are inside the city. The L8 FGC excavates under the Eixample, with accesses on Carrer Comte d'Urgell in a consolidated residential area. The L9/L10 central trunk bores under Sarrià-Sant Gervasi and Lesseps. La Sagrera lies in dense urban land between Sant Andreu and Sant Martí. The Mediterranean Corridor sections in service under live load require scheduled closures designed to the minute.

Critical points of the final access to this type of works, identified before moving the piece:

• Municipal time restrictions. In consolidated Eixample and Sant Martí areas, oversized equipment movement on public roads is restricted to night windows (22:00 to 06:00) or, in some sections, weekends. Barcelona City Council conditions these authorisations on specific coordination with the Guàrdia Urbana and Mossos d'Esquadra; the unloading window at the works must coincide with the circulation window, which rarely happens by accident.
• Bearing capacity of the launch-shaft accesses. A TBM launch shaft — the case of the Gran Via shaft for L8 FGC, active throughout the boring phase from June 2026 — receives components and spare parts arriving by truck and unloaded by crane, both with pressures concentrated on a limited space. The temporary unloading platform, executed on urban ground that in many cases hides buried services (gas, electricity, telecommunications), does not always support the combination of modular transport and high-capacity crane without prior reinforcement.
• Turning radius in consolidated urban areas. The hydraulic modular combination with a singular TBM component and tractor can exceed 30 metres in transport position. The minimum free turning radius required — between 18 and 22 metres — is rarely available at the typical Eixample crossing without affecting parking, urban furniture or, in extreme cases, façades.
• Clearance at urban gantries, overhead lines and aerial cabling. For pieces exceeding 4.50 m height — the case of some TBM components transported in shipping position — overhead tramway lines, trolleybus contact lines or telecommunications cabling can invalidate entire itinerary sections. The solution is usually a scheduled cut with the operating company, a procedure that adds 48 to 72 hours to the schedule when a window is available.
• Coordination with the contractor's site programme. A singular piece arrives when the works are ready to receive it: crane contracted, installation team mobilised, rail-traffic closure window coordinated with Adif or FGC. A transport delay translates into lost hours of expensive idle equipment and, on rail works over a line in service, into service closures rescheduled with reputational cost.

The planning that avoids these bottlenecks is done before loading the piece at origin, not en route.

Common mistakes when planning civil-works and rail transport

Underestimating the TBM spare-parts flow. Logistics attention concentrates on the initial assembly of the machine — cutter head, shield, drive head — and ignores the spare-parts flow that sustains the subsequent years of boring. A cutter head requiring replacement, a hydraulic system that fails, a critical bearing: all arrive as singular cargoes with closed deadlines. The L8 FGC and L9/L10 works sustain this flow for several years; planning only the initial phase means planning half.

Treating the switch and crossing as a conventional heavy piece. The complete switch and crossing is not just mass: it is calibrated geometry. The transport support and securing during the trip must preserve switch alignment and rail separation. A switch arriving on site deformed by poor stowage is rejected at inspection and the schedule breaks.

Assuming long precast beams fit on a standard flat platform. A 35 m beam requires a specific extendable platform, with gooseneck configured for controlled overhang and, in many cases, a self-propelled rear bogie at the front for urban manoeuvres. The conventional flat platform covers beams up to 21–24 m. Beyond that, the equipment change is a rule, not a recommendation. The flows forecast for the Castelló-València section during 2026–2027 require this format.

Confusing the overhang threshold with an automatic escort trigger. Rear overhang above 3 metres triggers the obligation of an endorsed feasibility study, not automatic officer accompaniment or self-escort regime. Self-escort is a separate regime that requires a specific application and a DGT-authorised itinerary. Treating overhang and escort as synonyms generates badly formulated applications and rejected authorisations.

Applying for the ACC without having confirmed equipment and configuration. The real parameter of the combination in transport position depends on the piece and the platform or modular used. An authorisation issued with estimated parameters is invalidated when the piece arrives with different dimensions, and the procedure must be repeated, with up to 3 months lead time for exceptional authorisations.

Forgetting coordination with the Adif or FGC site programme. Rail works on infrastructure in service — the case of the Mediterranean Corridor on the Castellbisbal-Vilaseca section and the accesses to the Port of Castelló — are executed in traffic-closure windows scheduled months in advance. The delivery of singular equipment must fit those windows. Requesting circulation authorisation without verifying availability of the works window is wasted work.

Ignoring night restrictions in central Barcelona. Singular equipment in Eixample, Sants-Montjuïc, Sant Martí, Gràcia or Sarrià-Sant Gervasi moves mainly in the night window on weekdays, with very few exceptions. Designing the delivery schedule while ignoring that operational restriction means replanning when the truck arrives.

Not anticipating partial dismantling on site. Some pieces — the case of tower cranes mounted for high-rise works or portable concrete plants — arrive in a transport configuration requiring partial dismantling on site before final installation. The dismantling operation requires space, auxiliary crane and specialised personnel. If not planned together with the delivery, the piece sits in the works yard waiting.

How we approach this at PASTOR

Sixty years of family tradition in special transport from Catalonia leave something measurable: frequent presence on projects across the Mediterranean Corridor and the Ebro Corridor, specific accreditation at the Port of Barcelona where applicable, own fleet with conventional and extendable low beds, hydraulic modular configurable to platforms moving singular cargoes of several hundred tonnes, and operational access to SPMT for final manoeuvres in urban works. PASTOR operates with a qualified gestor de transporte under ROTT arts. 111 and 112 and RD 70/2019, current MDP authorisation, fleet ITV up to date and a documentation file closed before each operation.

For each piece — a TBM cutter-head spare from Germany or Italy, a 35 metre precast beam from a Catalan or Italian plant towards the Mediterranean Corridor, a 110 t traction substation transformer, a complete switch and crossing for La Sagrera, a tamping machine for Castellbisbal-Vilaseca — the PASTOR operations engineering team prepares: analysis of physical parameters (mass, height, length, width, overhang, mass distribution), proposal of combination configuration, sketches in transport position, turning-radius simulation against the critical points of the proposed itinerary, validation against urban clearances and works accesses, categorisation of the ACC applicable on each stretch under DGT or SCT regime, identification of the accompaniment regime applicable by width and overhang, endorsed feasibility study when the parameters require it, and coordination with the port authority when the equipment enters via the Port of Barcelona.

When the equipment starts moving, the permits cover the real parameters of the combination, the competent authorities know what is arriving, when and by which route, the destination works site has a confirmed unloading window, and the contractor knows the piece is arriving on the day we said. The shipper holds a single point of contact: ours.