Travellers by car should avoid Genoa at least for the near future. A major bridge has collapsed that carries the only autostrada from Genoa to Liguria Ponente and southern France (A10). It will no doubt take days for any kind of work-around to be implemented.
EDITED: Some rail traffic has been suspended due to damage. The Genova — Savona — Ventimiglia rail service was reopened by Tuesday evening.