The Truck Fair That Splits Germany in Two

The fair runs September 15 to 20 in Hannover. Germany splits trucks and cars into two shows, in even and odd years.

IAA Transportation opens today in Hannover and runs through Saturday, September 20. If you have seen the name on a calendar without knowing what it is, the short version is that this is where the commercial vehicle industry shows what it plans to sell next.

The fair takes place at the Hanover Fairground, with the press day held yesterday, September 14. The previous edition ran September 17 to 22, 2024.

Why it happens in even years

The reason the calendar looks the way it does goes back to 1991. Until then, the IAA was a single show covering passenger cars and commercial vehicles together.

By 1989 that had stopped working. The last combined edition confirmed what organizers already suspected: the Frankfurt exhibition site was simply too small to hold both halves of the industry at once.

The VDA, the German automotive industry association, split the event in two. Passenger vehicles took odd years, commercial vehicles took even years. That is why there is an IAA Mobility in 2025 and 2027, and an IAA Transportation in 2024 and 2026. Two fairs, two venues, one original name.

What a trade fair like this is actually for

For an owner-operator or a small fleet on this side of the Atlantic, a European trade fair can feel like something that happens to other people. It is worth understanding anyway, for one practical reason: what gets announced in Hannover tends to describe the trucks you will be quoted on years later.

Commercial vehicle shows are where manufacturers commit publicly to drivetrains, cab designs, telematics and emissions strategies. Those commitments travel. A powertrain shown in Germany often arrives in North America in a modified form, and the timeline between the two is usually measured in model years rather than decades.

The second reason is supply. Parts suppliers exhibit alongside the truck makers, and the components that show up in European cabs frequently end up inside the units that arrive at an American shop for service. Knowing what is coming is part of knowing what you will eventually be repairing.

What the attendance numbers do and do not say

Here is where it pays to be careful with figures, because this fair has a genuinely interrupted history.

The 2018 edition, the 67th, drew 2,174 exhibitors. The 2020 edition was cancelled outright because of the covid pandemic. When the fair returned in 2022, it registered 1,402 exhibitors, well below where it had been four years earlier.

For 2024, the historical record does not publish a confirmed exhibitor count. For 2026, neither the official site, its press section, its newsroom, its exhibitor section nor the VDA press page states a figure.

So the honest summary is this: the last firm number is 1,402 from 2022, and that number came after a cancellation. Anyone telling you the fair has recovered to its pre-2020 size is filling in a blank that the organizers themselves have not filled.

Why a European fair still sets an American calendar

There is a structural reason announcements in Hannover matter to a shop in Texas, and it has to do with how the industry is organized rather than with geography.

Most of the large commercial vehicle groups operate on both continents. A drivetrain strategy is not developed for one market and then invented again for the other. It is developed once and adapted, which means the engineering decisions revealed at a European show are frequently the same decisions that reach North American dealers later, wearing different badges and adjusted for different emissions rules.

Emissions is where the gap is widest and the timing least predictable. European and American regulations move on separate schedules, so a technology that is standard equipment in Hannover may arrive years later here, or arrive in a reduced form, or not arrive at all. That is a reason to read announcements carefully rather than dismiss them, and also a reason not to assume anything shown on a stand is coming to your dealer next spring.

Telematics and cab electronics travel faster than powertrains, because they carry less regulatory weight. Screens, driver monitoring and connectivity packages tend to cross over with relatively little modification, and they are also the systems most likely to change what a service visit looks like.

What to take from it if you are not going

• The fair runs September 15 to 20, 2026, at the Hanover Fairground.
• It covers commercial vehicles only. The passenger car half is a separate event in odd years.
• Announcements made here describe the trucks and components you will be quoted on and repairing in future model years.
• Exhibitor counts before 2024 are documented; 2024 and 2026 are not. Treat any specific figure for those years as unverified.

Trade fair season is a good moment to look at the unit you already own rather than the one on a stand. If you want your current truck measured against what it actually does on its worst week, the shop can check it.

Original source: IAA Transportation