China's Rail Ambitions Hit the Buffers in Central Europe

The Budapest–Belgrade flagship project finally moves freight — but a clash of signalling standards is casting a long shadow over its passenger future

After four years of construction delays, cost overruns and post-Novi Sad political turbulence, freight trains began running on Hungary's section of the Budapest–Belgrade railway on 27 February. The milestone was swiftly cast in triumphant language by Budapest. The operational reality, however, tells a rather different story.

The line, a 166-kilometre stretch designed for speeds of up to 160 km/h and funded largely through a loan from China's Export-Import Bank, represents one of the most expensive railway investments in Hungarian history. The physical infrastructure — track, stations, electrification — is complete. What is not complete is the train control system.

The problem lies in a fundamental incompatibility between European and Chinese engineering standards. The safety and signalling systems originally planned by China for the Hungarian section did not carry EU operating licences and did not comply with the European Union's standardised European Train Control System, known as ETCS. The result is an operational absurdity: electric locomotives cannot currently cross the border, requiring diesel substitutes and additional locomotive changes at the frontier.

Capacity constraints compound the problem. With the ETCS system uncommissioned, only one train can run in each direction across the entire 160-kilometre section at a time, with the next departure only permitted once the preceding service has cleared the line.

Passenger services, initially expected in early March, may now be postponed until the train control system is fully certified. For a project marketed as a Belt and Road showpiece — the critical land bridge between Central Europe and the Chinese-operated port of Piraeus — the delay is more than a scheduling inconvenience. It is a visible reminder of the friction that arises when Beijing's infrastructure ambitions collide with Brussels' regulatory architecture.

Europe's railways are watching closely.