Custom Stadler trains debut on Mount Vesuvius routes

Custom-built Stadler electric trains have begun carrying passengers around Mount Vesuvius on Naples’ Circumvesuviana network, marking a long-awaited step in the renewal of one of Italy’s most tourism-critical yet historically troubled rail lines.

A new chapter for the Circumvesuviana

According to recent announcements from regional operator Ente Autonomo Volturno (EAV) and subsequent media coverage, Italy’s rail safety agency has granted authorization for the first of the new Stadler-built trains to enter service on the Circumvesuviana network in the summer of 2026. The green light follows months of dynamic testing and documentation, and clears the way for the trains to start commercial operations on routes skirting Mount Vesuvius and linking Naples with Pompeii, Sorrento and other Vesuvian towns.

The debut comes after repeated delays linked to manufacturing complexity, certification procedures and disruptions at Stadler’s production facilities in Valencia. Earlier delivery schedules pointing to an initial 2024 entry into service were pushed back, with EAV publicly revising its timelines several times before confirming the latest target dates. The first unit is now reported to be in operation, with additional trains due to follow over the coming months.

The Circumvesuviana is a 950-millimetre narrow-gauge network that threads through densely populated suburbs and major archaeological sites around the volcano. Its aging fleet and chronic overcrowding have drawn criticism from commuters and visitors alike, turning the launch of modern rolling stock into a closely watched test of whether service levels can finally be brought in line with the area’s tourism profile.

Custom design for a challenging volcano-side network

Stadler’s trains have been custom-engineered for the Circumvesuviana’s tight curves, steep gradients and constrained station platforms. Publicly available technical information indicates that the new electric multiple units are based on Stadler’s METRO family but adapted to the network’s 950-millimetre gauge and specific clearance limits, resulting in a compact profile designed to navigate the twisting alignment between Naples and the Vesuvian towns.

The trains feature full low-floor access at the doors to simplify boarding on busy commuter and tourist services. Wide internal gangways allow passengers to move easily along the length of the train, and layouts include designated areas for wheelchairs, strollers and luggage, reflecting the mix of daily riders and short-stay visitors heading to Pompeii, Herculaneum and coastal resorts. Reports on the project indicate that air conditioning, real-time passenger information systems and modern lighting are standard across the new fleet.

From an operational perspective, the new units are intended to standardize performance and maintenance on a network that currently relies on multiple generations of rolling stock dating from the 1990s and earlier. EAV statements and Stadler documentation describe energy-efficient traction systems designed to reduce consumption on the stop-start suburban runs between Naples, Ercolano, Pompei and Sorrento, with regenerative braking feeding power back into the grid where infrastructure allows.

Safety upgrades on Italy’s volcanic commuter lifeline

Beyond passenger comfort, the new trains are notable for their advanced safety technology. According to information released in late 2025 and 2026, the Vesuvian fleet will be among the first narrow-gauge, isolated regional railways in Europe to deploy trains prepared for the European Train Control System Level 2 on 950-millimetre track. ETCS Level 2 is designed to provide continuous speed supervision and movement authority via radio, reducing reliance on lineside signals.

The adoption of this standard is part of a broader safety and modernization program funded in part through Italy’s National Recovery and Resilience Plan. Upgraded onboard systems are expected to improve adherence to speed limits, help prevent signal overruns and support more consistent headways on crowded stretches of the network, especially on the axis between Naples and the main archaeological stops.

For visitors using the Circumvesuviana as a gateway to Mount Vesuvius and the UNESCO listed ruins at Pompeii and Herculaneum, the safety enhancements remain mostly invisible but play a role in reshaping the line’s reputation. In recent years, online discussion boards and travel advisories have frequently described the service as unreliable, with aging trains, cancellations and crowded conditions. The new fleet is intended to underpin a more predictable operating pattern and eventually allow older vehicles to be retired.

Phased roll-out and long-term fleet renewal

The trains now entering service are part of a larger framework agreement between EAV and Stadler for up to 100 electric multiple units dedicated to the Vesuvian lines. Earlier contracts and subsequent updates indicate that an initial batch of 16 units was followed by additional orders, bringing the total number of vehicles in various stages of production and planning to several dozen. The rollout is being phased over multiple years, with priority given to the busiest Naples to Sorrento and Naples to Poggiomarino corridors.

Published timelines suggest that around a dozen new trains should be in regular service by the end of 2026, with the fleet expected to grow to more than 40 units by 2027 if manufacturing and certification progress as planned. Each new delivery allows EAV to reassign or withdraw older sets, gradually reshaping the composition of the Circumvesuviana fleet. However, regional media note that the complete replacement of legacy trains will take longer, extending into the second half of the decade.

Travel industry observers point out that the timing coincides with a post-pandemic recovery in international tourism to southern Italy. Passenger demand on routes serving Pompeii and the Amalfi Coast gateway at Sorrento has rebounded, intensifying pressure on the existing rail and road infrastructure. A successful ramp-up of the new trains could help stabilize timetables and absorb peak-season crowds that have often overwhelmed platforms and carriages in the past.

What the upgrade means for visitors to Vesuvius and Pompeii

For travelers, the most immediate change as the Stadler units enter service will be a visibly newer train on some departures from Naples Porta Nolana and Napoli Garibaldi toward the Vesuvian destinations. Interior layouts are designed with through corridors and wide doors, which should ease boarding with backpacks and suitcases. Modern air conditioning and clearer audio and visual announcements are expected to improve the experience on journeys that can be crowded, especially in summer.

Trip planners note that the fundamental travel pattern remains the same: visitors typically take the Circumvesuviana to stations such as Pompei Scavi Villa dei Misteri or Ercolano Scavi and then connect with local buses or shuttle services to reach the Mount Vesuvius crater area. The new trains do not alter that structure but aim to make the rail leg faster to board, more comfortable and, over time, more reliable than the aging fleet they supplement.

As more units join the roster, there is potential for EAV to adjust frequencies and reduce disruptions caused by vehicle shortages, which have historically led to gaps in service. While the roll-out is still in its early stages, the entry into passenger service of the first custom-designed Stadler trains marks a visible shift on the tracks around Mount Vesuvius, signaling that one of Italy’s most iconic tourist corridors is beginning to receive the rolling-stock upgrade long promised to both residents and visitors.