North to south, out of seasonSection 4
The long run south
Below Naples, road distances compress into hours and the service infrastructure that sustained the journey north of Rome quietly disappears.
Where the network thins
The autostrada continues — the A3, then the reformed Salerno-Reggio Calabria, now signed as the A2 Autostrada del Mediterraneo — but the layer of service that travelled with it through Lombardy and Tuscany does not. North of Rome, an area di sosta (a dedicated motorhome service point, with fresh water, grey drain and chemical dump) appears every thirty or forty kilometres on major routes. South of Naples the gaps widen sharply, and whole provinces have almost none. A campeggio — a licensed campsite — exists on the coast in summer, but outside July and August a coastal campeggio either closes or runs skeleton staffing. The interior alternative is rarely there at all.
This is not a characterisation: any single commercial listing of registered sosta facilities in southern Italy is a partial source, so the more neutral reference is the Sosta network, which the Italian motorhome federation (APC, Associazione Produttori Camper) has mapped and lobbied to extend for two decades. The density gradient is documented, and any route planning south of Salerno should account for it.
The long run south is not harder than the north; it is thinner.
The practical consequence is tank discipline. Grey capacity and fresh water become the constraints, not fuel. Below Salerno the route through Calabria — hugging the Tyrrhenian coast on the SS18 or the faster A2 inland — offers few natural refill points, and a van without full tanks at the start of a 300-kilometre Calabrian run is a van making unscheduled stops.
Gross vehicle weight matters here for a different reason than on an alpine pass: Calabria and the toe of Basilicata have a number of secondary bridges with posted limits below 3.5 tonnes, and the signed diversions are long. A motorhome at 6 or 7 tonnes GVW cannot treat a local road atlas as reliable routing. The Italian Highway Code, Article 167, governs weight limits on public roads, and posted bridge signs take absolute precedence over navigation software.
The ZTL (zona a traffico limitato — limited-traffic zone) problem does not go away south of Naples; it concentrates differently. Hilltop towns in Basilicata and the Cilento coast in Campania use ZTL enforcement less consistently than Lucca or Bormio, but the varco — the camera-read gate — operates on the same national plate-recognition infrastructure wherever it is installed. Inconsistency is not absence.
The long run south is not harder than the north; it is thinner. The margin for error on water, on weight, on overnight options — that margin is what narrows.
