On the last couple of days of my stay in 2001, I took a series of photo's of the foreshores from a position on a jetty jutting into the Gulfo di Gaeta (at Formia). So as I was standing in the water (so to speak), I had an ideal opportunity to observe the vehicles coming and going from Formia.
Formia is like a starting point to many places in Lazio -- Gaeta, Itri, Fondi, Minturno, Maranola, Castellenorato, and Scauri to name a few. Further afield can be Sperlonga, Terracina, and Campodiemele etc., but these busses are usually blue, and a different bus line. So, Formia station is a pretty busy place and uphill or steps from the main road of Formia (via Vitruvio) and the major shopping centre.