Port Lympia to the Vieux Port in one hour. The whole Riviera from the sea, no A8.
Leaving Nice by the A8 in summer means crawling the entire Riviera to Sainte-Maxime, then the RD559 into Saint-Tropez. No direct train reaches the town.
1 hour dock-to-dock from Port Lympia. Cap-Ferrat, Antibes and Cannes glide past, and you arrive right at the Vieux Port.