The job came in on a Tuesday. Pallets going to Istanbul, routing through Germany, Austria, and Bulgaria. Good rate. I took it.
Three days later, south of Sofia, DVSA equivalent stopped me at a Bulgarian weigh station. Not a roadside check I'd seen before. Different forms. Different process. My tacho card was fine. My records were fine. But the officers were checking against AETR -- the European Agreement Concerning the Work of Crews of Vehicles Engaged in International Road Transport -- not the EU 561/2006 rules I'd been running on all the way through France and Germany.
I'd never heard of AETR before that afternoon. Turned out the rules were almost identical. Almost. The differences are what matter.
When does AETR apply?
EU 561/2006 as retained in UK law -- what the gov.uk guidance now calls "assimilated rules" -- covers driving within the UK and to, from, or through EU member states. That's France, Germany, Netherlands, Belgium, Spain, Italy, Poland, and so on.
AETR kicks in when your route goes through a country that isn't in the EU but has signed the AETR agreement. The list includes Turkey, Ukraine, Belarus, Georgia, Armenia, Kazakhstan, Moldova, Montenegro, Serbia, North Macedonia, Albania, Bosnia and Herzegovina, Norway, Switzerland, Monaco, and Russia. The UK itself is on that list too, which is relevant for foreign drivers coming in.
Switzerland and Norway are in there, which surprises some drivers. Both opted into AETR rather than full EU 561, though their rules align closely. Turkey is the one that catches most UK hauliers -- it's a major destination for international freight and it's definitively outside the EU 561 zone.
The practical point: if any part of your route goes through an AETR country, AETR applies to that leg. You don't get to switch back to EU 561 once you cross back into an EU country mid-trip. Well -- technically you do revert to assimilated rules for the EU leg, but you need to be compliant with AETR for the non-EU portion, and enforcement officers in countries like Bulgaria or Romania (on the route to Turkey) will check both.
How AETR differs from EU 561
The good news: mostly the same. Daily driving limit of 9 hours, extendable to 10 hours twice per week. Weekly limit of 56 hours, 90 hours across any two consecutive weeks. Breaks: at least 45 minutes after no more than 4.5 hours of driving, splittable as 15 then 30. Daily rest: 11 hours minimum, reducible to 9 hours up to three times between weekly rests. Weekly rest: 45 hours full, reducible to 24 hours every other week.
These numbers match EU 561. If you've been driving compliantly under assimilated rules, you're in good shape for AETR on the basic limits.
The differences are in a few specific areas.
Reduced weekly rest. Under EU 561 as applied in the UK, you can take two consecutive reduced weekly rests (both at 24 hours) if certain conditions are met -- specifically if you're outside the UK and your country of establishment. Under AETR, you can only take one reduced weekly rest in a row. The next one has to be a full 45-hour rest. If you're planning a long international run through multiple AETR countries and banking on back-to-back reductions, the rules are stricter.
Ferry rest interruptions. Under EU 561, you can interrupt an 11-hour regular daily rest twice during a ferry or train crossing, as long as you have access to a berth or couchette and the rest is at least 9 hours in total across the two parts. AETR allows the same ferry interruption exception but only for the 11-hour regular daily rest. The reduced 9-hour version can't be interrupted. Small distinction, but it's caught drivers on long overnight ferry crossings who thought they had more flexibility.
The four-week base rule. Under EU 561, drivers are expected to return to their employer's establishment or their home at least every four weeks if they've been taking reduced weekly rests. AETR is slightly more flexible on this -- it doesn't carry the same four-week return obligation. For tramping operations going deep into AETR territory, this matters less but it's worth knowing the distinction exists.
The tachograph card still works
Your UK-issued driver card is valid throughout AETR countries. You still insert it, the vehicle unit still records everything, and enforcement at the roadside will read the card the same way. Digital tachograph equipment manufactured to EU standards is accepted across AETR signatories -- the recording requirements are harmonised even if the precise hours rules have minor differences.
What changes is the analysis at the roadside. Officers in an AETR country are checking your records against AETR rules, not EU 561. If your rest pattern has relied on provisions that exist under EU 561 but not AETR, you're potentially in breach even if the records look clean under the rules you thought applied.
Took me a while to work out that the Bulgarian officer wasn't being difficult. He was applying the correct rules for that leg of the journey.
What the operator needs to know
If you're a transport manager running international freight through Turkey or any other AETR-only country, your drivers need briefing before they go. Not a long briefing -- the rules are largely the same -- but specifically on the reduced weekly rest sequencing and the ferry interruption difference.
Route planning also matters. A driver going Immingham to Istanbul is covering roughly 2,800 kilometres with significant time in non-EU AETR territory. The weekly rest calculation changes slightly. Budget for it, and make sure the driver knows which rules apply on which leg.
Infringement analysis software -- Optac, TachoMaster, and the others -- should flag which rules applied on which leg based on the GPS or manual country entry. Check that your analysis software is set up correctly for international runs. Some cheaper systems default to EU 561 across the board and miss the AETR leg.
Roadside stops in AETR countries
What happens at a check site in Turkey or Ukraine is broadly similar to a DVSA roadside stop in the UK. The officer will ask for your driver card, your printout if needed, and vehicle documentation. They'll run the card data. They'll check your working time records match what they see.
The graduated fixed penalty approach used in the UK doesn't apply. Each country has its own penalty structure. Turkey runs its own enforcement regime under AETR, and fines for hours infringements in Turkish enforcement zones are real -- not symbolic. I'm not going to quote figures because they're updated periodically and worth checking before the trip, but budget for the reality that a rest period breach in Turkey costs more than a minor fixed penalty in the UK.
The key documents to have in the cab: your driver card, a printout for any periods you drove without the card or with a fault, and your 28-day record on the card (same as UK). If you've been through any AETR countries previously on the same card cycle, those records are visible. Keep them clean.
A practical point on Norway and Switzerland
Both Norway and Switzerland run enforcement regimes that are rigorous even by UK standards. Switzerland particularly has a reputation for thoroughness at the border -- the San Gotthard tunnel and the A2 corridor are well-resourced enforcement zones. Norway's E6 corridor north toward Oslo gets regular spot checks on HGV traffic.
Neither country joined the EU, but both adopted AETR and have their own bilateral agreements. Switzerland bans heavy goods vehicles over 40 tonnes on certain routes (the alphanumeric cantonal roads) at certain times. That's separate from drivers' hours but it's the kind of detail that doesn't come up at a UK depot briefing and gets flagged at the Swiss border.
If you're tired of tracking compliance manually across multi-country runs, ShiftOwt handles 561 and WTD compliance tracking automatically -- 5.99 per month for drivers, agency pricing on request. International route support is on the roadmap.
The short version
AETR and EU 561 are close enough that most compliant drivers won't notice the difference in daily operation. The key gaps: one reduced weekly rest maximum in sequence under AETR (not two), and the ferry interruption exception doesn't apply to reduced daily rest. Brief your drivers on those two points before an international run through Turkey or the eastern AETR countries, and make sure your analysis software is flagging the right ruleset for each country leg.