Rome's means of transport
Touring Rome on foot is entirely possible because the historic aspects only span about 1.5 miles in diameter. However, if your visit extends outside of the historic center it is important to research the means of transportation available prior to arriving in Rome.
While Rome’s bus system is extensive and functional, the metro (subway) is often easier for visitors. It consists of an A line (red) and a B line (blue) that travel around the historic city as opposed to through it. Frequent stops (every 7 to 10 minutes) from 5:30 am to 11:30 pm make it the ideal mode of transportation for short term visitors. Tickets are available at bars, vending machines, and newsstands.
If you do prefer to ride to bus your options are much more extensive. Hundreds of bus lines travel in every direction from 5:30 am until midnight. There are also 20 night bus lines that run during the remaining hours. These lines are symbolized with an owl and tickets are purchased on board. Electric buses navigate small alleyways in the backstreets of the historic center to minimize pollution.
However, if you would really like to live as the Romans do consider renting a Vespa to tour the city. Rental places are located all around and the rental average is only €40-€50 per day. With the Vespa you will have the freedom to visit the sites that interest you in less time than public transportation.