Bridge strikes: why it's the standard trailers, not the awkward loads, that keep hitting them.

The A5 Watling Street bridge in Hinckley has been hit twice in two days this month. It's not a new problem — this stretch of railway bridge has been fought over for the best part of a decade, was once officially the most-struck bridge in Britain, and a scheme to lower the road beneath it has been delayed again. But the bridge itself isn't really the story. What's more interesting, and more useful to any operator reading this, is what's hitting it.

It isn't low loaders. It isn't car transporters, crane-mounted plant, or anything carrying an awkward, variable-height load — the vehicles you'd expect to be most at risk, given their height changes with every job. Look through the reported incidents at Hinckley over recent years, and the vehicles doing the damage are overwhelmingly standard curtainsiders and box trailers — vehicles with exactly the same travelling height every single day. Nobody publishes an official breakdown of strike vehicle types for this bridge, so this is an observed pattern rather than a cited statistic — but it's a consistent one, and it points to a problem that's about behaviour and system design far more than it's about any particular vehicle type.

The numbers behind the problem

Bridge strikes aren't rare. Across the UK rail network there are roughly 1,700 to 1,800 reported strikes a year — an average of four to five every single day, with the true figure on road-over-road structures likely higher again since not all of those get centrally recorded. The Hinckley bridge alone was struck 88 times between 2017 and September 2022, and has remained inside the national top ten most-struck list ever since, despite a 4.6 metre (15 foot) clearance that's clearly signed with both a triangular warning and, closer to the bridge, an order sign.

The disruption isn't trivial either. A single incident at Hinckley can close the road in both directions for hours, and Midlands Connect's analysis of just a handful of the bridge's strikes put the combined cost of resulting delays at over £126,000 — before accounting for the diverted journeys and cancellations that never make it into the official figures.

Nationally, Highways England has noted that around two-thirds of bridge strikes involve a vehicle carrying a load of some kind, rather than an empty vehicle — a reminder that height isn't a fixed, one-off fact about a chassis, but something that can shift with what's loaded on any given day, even on a vehicle whose unladen height rarely changes.

Why signage and clearance alone don't fix it

The instinctive assumption is that more signs, brighter signs, or better-lit warnings would solve this. Hinckley already has both a warning triangle and an order sign, in imperial and metric measurements, and it's still one of the most-struck structures in the country. That tells you something important: this isn't primarily a signage-visibility problem. It's a decision-making problem that happens before the driver is anywhere near the bridge.

Network Rail's own research bears this out. In surveys of drivers involved in or at risk of bridge strikes, close to a third to over two-fifths admitted they didn't know the height of their vehicle when they set off, and more than half said they hadn't considered low bridges at all when planning their route. The failure, in other words, usually happens at the depot or in the cab before departure, not at the bridge itself — by the time a driver is reading a height sign at speed, the more useful safeguard has already been skipped.

The complacency trap: why fixed-height vehicles are the ones getting caught

This is the part worth dwelling on, because it cuts against the obvious assumption. You'd expect a low loader or car transporter — where the load height genuinely changes with every job — to be the highest-risk vehicle on the road. In practice, those are often the drivers most switched on to the risk, precisely because their vehicle's height is never a given. Checking it isn't optional; it's the only way to know the number at all. That would help explain why they feature so rarely in the reported incidents at Hinckley, even though they're the vehicles you'd instinctively expect to be more error-prone.

A standard curtainsider or box trailer is the opposite case. Its height is fixed, day after day, load after load. And that's exactly the condition that produces complacency. Industry guidance on this is blunt about the mechanism: drivers who record the same height reading every single day start to see the check as pointless, and are tempted to stop doing it — or to do it as a rote box-tick rather than an active safety step. The height indicator, legally required in the cab of any vehicle over 3 metres since 1997, becomes wallpaper. Nothing about the routine ever changes, until one day the route does — a diversion, an unfamiliar delivery, a driver covering someone else's run — and the vehicle that's "always fine" meets a bridge it's never been past before.

Route planning failures compound this. A driver who's confident of their vehicle's height but relying on a car sat-nav, local knowledge, or a shortcut to save ten minutes is exposed in exactly the same way — the height was never the unknown; the route was. The Hinckley bridge sits on the A5 right where it meets the M1, M69 and M6, in the heart of what's sometimes called the Midlands "Logistics Golden Triangle" — one of the densest freight corridors in the country. That makes the road a natural cut-through whenever any of those motorways backs up or closes, which is often. A driver diverted off a route they know well and onto the A5 as an unplanned alternative is precisely the scenario where a fixed-height vehicle's usual safety margin disappears — the habitual "my vehicle always fits" assumption was built for the normal route, not for wherever the sat-nav or a police diversion sends them instead.

What this means for a compliance system, not just a driver

The instinct is to treat bridge strikes as a driver-training issue, and training matters — but a system that depends entirely on a driver's vigilance every single day, for years, without ever failing once, isn't a robust system. It's a system waiting for a bad day. The operators who avoid this problem build it into process rather than relying purely on habit:

A written policy that treats the height check as a fixed part of the daily walkaround, not an optional add-on — and one that's audited for whether it's genuinely happening, not just signed off.

Route planning using HGV-specific navigation, not a car sat-nav or local knowledge, with known low bridges flagged in advance rather than discovered at the wheel.

A specific process for unfamiliar routes and cover drivers, since that's precisely the scenario where a fixed-height vehicle's normal safety margin evaporates — the driver's confidence in "my vehicle always fits" doesn't transfer to a road they've never driven.

Genuine escalation when height information doesn't match the load, since a fifth-wheel adjustment or an insecure load can quietly change a vehicle's travelling height without anyone updating the indicator.

None of this needs to be expensive or complicated. But it does need to exist as policy rather than assumption — because "our drivers know the height of their vehicle" is precisely the sentence that precedes almost every bridge strike involving a fixed-height fleet vehicle.

It's also worth operators weighing up the technology now available to back up the policy rather than relying on it alone. In-cab low bridge warning systems exist, using GPS and a mapped database of known low structures to alert a driver in real time as they approach one — regardless of whether the driver remembers the route, is covering someone else's run, or has been diverted somewhere unfamiliar. There's a cost to fitting and running them, and no piece of technology replaces a proper policy — but set against the alternative, that cost looks small.

A single strike doesn't just mean vehicle damage and a closed road. The Senior Traffic Commissioner's own guidance on vocational driver conduct is explicit: a driver who disregards routing information or road signs and strikes a bridge can expect their LGV or PCV licence to be revoked and to be disqualified from holding one for six months — a starting point set out in published guidance, not a rare or unusually harsh outcome. This is a separate process from any criminal prosecution for the driving itself, heard before the Traffic Commissioner at a driver conduct hearing, and it sits alongside whatever action follows against the operator's licence and the transport manager's repute. A driver can lose their livelihood over a single bridge strike, and an operator can lose the vehicle, the driver, and face its own public inquiry, all from one avoidable incident. Weighed against that, an in-cab warning system is a modest outlay for a problem that otherwise tends to be expensive in ways that don't show up until after it's happened.

Where this sits in your compliance system

On audit this cuts across scheduling and routing (framework section 4.2, which specifically includes avoidance of bridge strikes) and vehicle weight and height compliance (section 5.7). What we're really testing is whether height and route planning is a documented, checked process or a habit resting entirely on driver memory. A fleet running the same familiar routes for years can look completely safe on paper right up until the day a diversion, a new contract, or a covering driver removes the one thing that was actually keeping it safe.

If you'd like your route planning and height-check processes reviewed as part of a full compliance audit, that's exactly what we do. Get in touch at enquiries@ukfleetaudit.co.uk.

References

BBC News (2020) Hinckley railway bridge sits top of 'most bashed' chart. Available at: https://feeds.bbci.co.uk/news/uk-england-leicestershire-54871244 (Accessed: 18 August 2026).

BBC News (2026) 'Britain's most bashed' bridge hit twice in two days. Available at: https://www.bbc.co.uk/news (Accessed: 18 August 2026).

BBC News (2024) Why do vehicles keep hitting this railway bridge? Available at: https://feeds.bbci.co.uk/news/articles/cpv2xpjk93po (Accessed: 18 August 2026).

BBC News (2023) Hinckley A5 bridge strikes 'cost economy thousands' per year. Available at: https://feeds.bbci.co.uk/news/uk-england-leicestershire-66191087 (Accessed: 18 August 2026).

Driver and Vehicle Standards Agency / Senior Traffic Commissioner (2023) A Guide to Driver Conduct Hearings. Available at: https://www.gov.uk/government/publications/a-guide-to-driver-conduct-hearings/a-guide-to-driver-conduct-hearings (Accessed: 19 August 2026).

GreenFleet (2025) Vigilance keeps HGV drivers safe and compliant. Available at: https://greenfleet.net/features/23092025/vigilance-keeps-hgv-drivers-safe-and-compliant (Accessed: 18 August 2026).

Institute of Transport Administration (2023) Bridge strike — licence curtailed. Available at: https://www.iota.org.uk/blog/bridge-strike-licence-curtailed (Accessed: 19 August 2026).

Hinckley and Bosworth Borough Council (2023) New report highlights cost of delays due to lorries hitting a low bridge on A5. Available at: https://www.hinckley-bosworth.gov.uk/news/article/230/new_report_highlights_cost_of_delays_due_to_lorries_hitting_a_low_bridge_on_a5 (Accessed: 18 August 2026).

Midlands Connect (no date) A5 corridor. Available at: https://www.midlandsconnect.uk/projects/roads/a5-corridor/ (Accessed: 18 August 2026).

Network Rail (no date) Wise Up, Size Up: preventing bridge strikes. Available at: https://www.networkrail.co.uk/who-we-are/our-safety-record/level-crossing-safety/wise-up-size-up/ (Accessed: 18 August 2026).

RTITB (2024) How LGV/HGV drivers can prevent bridge strikes. Available at: https://www.rtitb.com/how-lgv-hgv-drivers-can-prevent-bridge-strikes/ (Accessed: 18 August 2026).

Senior Traffic Commissioner for Great Britain (2025) Statutory Document 6: Vocational Driver Conduct. Available at: https://www.gov.uk/government/publications/traffic-commissioners-vocational-driver-conduct-january-2016/statutory-document-6-vocational-driver-conduct (Accessed: 19 August 2026).

Stream (2025) The true cost of bridge strikes. Available at: https://go2stream.com/blog/the-true-cost-of-bridge-strikes-and-how-to-avoid-them/ (Accessed: 18 August 2026).