The A12 autostrada and the old Via Aurelia (which ends up in Arles in French Provence) take you to Tarquinia.
The Via Aurelia is less congested than the A12 autostrada.
mnli hypothesis: The Via Aurelia is less congested than the A12 autostrada. premise: The A12 autostrada and the old Via Aurelia (which ends up in Arles in French Provence) take you to Tarquinia.