A United Kingdom-based Nigerian engineer, Ologe Solomon Ochuko, has issued a cautionary note on the growing but often overlooked impact of railway expansion on buildings in rapidly urbanising cities, warning that engineers may be underestimating the risks posed by vibration-induced noise and structural disturbances.

Ochuko, a Chartered Engineer (CEng) and Fellow of the Institution of Mechanical Engineers, said the increasing proximity of rail lines to residential and commercial structures presents a complex engineering challenge that current predictive models do not adequately address.

Speaking with The Guardian on his latest research, Ochuko explained that while much attention has traditionally been given to how vibrations travel through the ground, less focus has been placed on what happens when those vibrations reach buildings—an area he described as both technically difficult and critically important.

“Train movement generates vibration at the wheel–rail interface, which travels through the soil and eventually enters nearby structures,” he said. “Once inside, the vibration interacts with floors, walls, and other elements before becoming audible sound within rooms.”

Ochuko, who leads the Acoustic and Mechanical Engineering Laboratory at the Universitat Politècnica de Catalunya in Barcelona, said his work specifically addresses this latter stage—known as structural-borne or re-radiated noise—which he described as one of the least understood aspects of railway-induced vibration.

He noted that this phase involves a complex interplay between structural dynamics and acoustic behaviour, compounded by the varying responses of building materials across different frequencies.

As a result, accurately predicting the impact on occupants remains a major challenge in engineering practice.

To tackle this gap, Ochuko employs advanced computational modelling techniques, including the Singular Boundary Method, to simulate how vibrations evolve from their source to their final audible form.

His approach aims to help engineers anticipate what occupants are likely to hear inside buildings before railway systems are constructed or modified.

However, he stressed that prediction remains difficult due to uncertainties in key variables such as soil composition, building design, and environmental conditions.

“Uncertainty in these parameters is one of the main reasons predictions are often unreliable,” he said.

Despite these challenges, Ochuko argued that improving how such variables are incorporated into engineering models could significantly enhance the reliability of predictions, allowing stakeholders to address potential problems during the design phase rather than after construction.

His research has undergone expert review by Laura Mariana Babici of the Romanian Railway Authority, who reportedly affirmed its technical soundness and relevance to real-world engineering problems.

Beyond issues of comfort, Ochuko warned that railway-induced vibration could disrupt daily life, interfere with sensitive equipment, and, in some cases, pose longer-term structural risks.

 He emphasised that as railway networks expand—particularly in densely populated urban areas—the interaction between infrastructure and buildings must be taken more seriously.

“There is a gradual shift in engineering towards predicting issues earlier rather than reacting to them after construction,” he said. “By focusing on how vibration becomes sound inside buildings, this work addresses a part of the problem that directly affects occupants but is often overlooked.”