Slovakia
Cap in the app: 90 km/h.
Speed
90 km/h for a car under 3,500 kg with a trailer over 750 kg. The cap may not be exceeded even where the sign allows more: the exception in § 16 ods. 6 expressly applies only to vehicles without a trailer.
Source. Slov-lex, zákon 8/2009 Z. z. § 16 (PDF, version 2026-01-01)
Dimensions — breaching them is not prohibited, it requires a permit
Czechia's neighbour has the same figures but an entirely different consequence. Zákon č. 106/2018 Z. z. o prevádzke vozidiel v cestnej premávke § 44 ods. 8 does not prohibit an oversized outfit — it reclassifies it:
Ak vozidlo alebo jazdná súprava svojimi rozmermi a hmotnosťami prekračuje najväčšie povolené rozmery (ďalej len „nadrozmerná doprava“) … ustanovené vykonávacím právnym predpisom podľa § 136 ods. 3 písm. d), vozidlo podlieha povoleniu na zvláštne užívanie ciest.
An oversized outfit is therefore not unlawful in itself but nadrozmerná doprava, a form of transport requiring a permit to use the road. The delegation runs via § 136 ods. 3 písm. d) bod 2, which, addressing § 44 ods. 8 specifically, gives the transport ministry the power to set najväčšie povolené rozmery a najväčšie povolené hmotnosti.
Source. Slov-Lex, vyhláška č. 134/2018 Z. z., § 4, time version in force from 2025-01-01 (novela 391/2024 Z. z.), and zákon č. 106/2018 Z. z., time version in force 2025-07-01 to 2026-08-31 (novela 364/2024 Z. z.).
| Dimension | Slovakia | Article |
|---|---|---|
| Width, car | 2.55 m (category M1) | § 4 ods. 2 písm. a) bod 1 |
| Width, trailer | 2.55 m (category O; 2.60 for an insulated body) | § 4 ods. 2 písm. a) bod 2 and 3 |
| Height | 4.00 m (categories M, N, O) | § 4 ods. 2 písm. b) bod 2 |
| Length, caravan | 12.00 m (M1, N, O except semi-trailers) | § 4 ods. 2 písm. c) bod 3 |
| Length, outfit | 18.75 m (motor vehicle with one trailer) | § 4 ods. 2 písm. c) bod 11 |
The measuring method is the most explicit of all those retrieved. § 4 ods. 1:
Najväčšie povolené rozmery vozidiel a jazdných súprav prevádzkovaných v cestnej premávke vrátane prepravovaného nákladu nemôžu prevýšiť hodnoty uvedené v odsekoch 2 až 11. Najväčšie povolené rozmery vozidiel a jazdných súprav sa merajú bez žiadnych kladných tolerancií podľa informačného dokumentu ustanoveného osobitným predpisom. Zariadenia a vybavenie vozidla uvedené v osobitnom predpise sa pri určení najväčších povolených rozmerov nezohľadňujú.
Three things in one sentence: the load counts in, there is no positive tolerance to lean on, and the equipment EU law excepts is left out. Only one other country writes out that the tolerance is zero, and it was retrieved later: Slovenia, in 3. člen (2), with the same meaning in almost the same words. In practice this means a caravan whose registration document says 2.55 has no margin left — side awnings and mirrors excepted only to the extent the EU regulation excepts them.
The caravan is category O. What that means the law does not define itself: § 3 ods. 2 písm. d) says only "kategória O – prípojné vozidlá" and ods. 4 refers the subdivision to an osobitný predpis, identified in footnote 15 as art. 4 and annex I of regulation (EU) 2018/858. Slovakia is thus the country where the chain is longest: EU regulation → zákon → vyhláška, and the figures appear only in the third link.
Method note: the Slov-Lex static version is per version, and the wrong date gives the wrong paragraph number. The address slov-lex.sk/static/SK/ZZ/2018/134/<YYYYMMDD>.html delivers the whole text as HTML — but <YYYYMMDD> must be a valid date of entry into force, otherwise 404. The first retrieval was made on the original date 20180520 and gave the right figures but the wrong reference: in the 2018 version the outfit's 18.75 lay in bod 9, in the version in force it lies in bod 11, two new bus points having been inserted before it. Each page lists its own História with every version — that list is what shows which date applies.
Zákon 106/2018 moreover has two future versions already adopted (2026-09-01 by 131/2026 Z. z. and 2026-10-01 by 77/2026 Z. z.). Both were retrieved and § 44 ods. 8 checked word for word in them: unchanged in both.
Rules other than these. Alcohol limits, seatbelts, child seats, mobile phones, winter tyres and daytime running lights are not on Campeur and will not be. Your Europe, run by the Commission, has them country by country: road rules in Slovakia ↗. Do not read it for caravan speed — that cross-check has been made, and the portal was wrong in four countries out of twenty-one.