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First '''Option: 1''' This is the first gas station on the highway connecting Rome to the A1 highway going south. It's still inside the city, so very easy to reach, but it's already on the highway. There is a fence on the back but if you look trough some bushes where a little building is, the fence is broken and easy to climb, or there is an hole in the bottom (to be updated if they fix it). Go to Anagnina station either by metro or by bus (it's one of the biggest terminal in Rome) take the bus 046 and stop at "carnevale lettere", the gas station is only 400 m away. Walk back for a few meters cross the road and turn right on via cavaglieri, and then the first left, and at the end of the street there is the gas station. there are also other buses going around the area (500, 504...) just use the route planner of public transport to see what's the best for you

Second Option: Take Line No. 105 (Staz. ne Grotte Celoni) to the stop '''Casilina/Tor Vergata'' (29 stops), walk 150 meters, go to stop ''Tor Vergata/CasilinaOption 2'', take Line No. 507 (Anagnina (Ma)) to ''Heidelberg'' (4 stops) take Line No. 509 (Fosso del Cavaliere/CNR) to ''Fosso del Cavaliere/CNR'' (2 stops).

Just take bus Take Line No. 105 and then get off after (Staz. ne Grotte Celoni) to the stop '''Casilina/Tor Vergata'' (29 stops and follow ), walk 150 meters, go to stop ''Tor Vergata/Casilina'', take Line No. 507 (Anagnina (Ma)) to ''Heidelberg'' (4 stops) take Line No. 509 (Fosso del Cavaliere/CNR) to ''Fosso del Cavaliere/CNR'' (2 stops). Follow the sign Napoli to your right and then at keep left at the tournabout. Bus stops are a good indication that you're on the right path. ''Via del Fosso del Cavaliere'' takes you to the other side of the motorway, and from there keep walking towards the IP Frascati Ovest gas station; you can enter it from the backside. Don't bother about "forbidden entrance". And now you can continue hitchhiking towards Napoli/Sicily.

'''Option 1''' From Termini go by metro line B to Ponte Mammolo station, and there you can take bus 508 (that is first station) and go untill last station - Mondavio. That is one long ride and you will come close to crossroad of second ring of highway around Rome and highway from Rome to east [Pescara, L Aquila]. Actually from that last station (Mondavio),you have walking around 500m to highway and then choose left side walk to Roma Est Strada dei Parchi toll (around 1000m) 1 km or right side walk to Eni A24 Colle Tasso Sud gas station (the same distance)1 km. We were walking on the highway which is illegal, but we had a luck not to be caught by police. Link for buses and metro in Rome: http://www.atac.roma.it/index.aspLink for map of gas stations on italian highways: http://www.autostrade.it/

There's a much more practical option if you want to head east. It's a gas station at the very beginning of A24 on the outbound side. GPS coordinates are: [https://www.google.com/maps?q=41.900767,12.549775 41.900767, 12.549775]While the gas station described above has got traffic heading other directions already filtered out, this one serves people going multiple directions, but is way closer to the city center, easier to reach and still very effective. From Roma Termini, ride subway line B towards Rebibbia, and get off at Monti Tiburtini. From there, walk down the main road until you're just past the second overpass (exact coordinates here: 41.902511, 12.556836). From there, walk up the off-ramp trying to keep behind the guardrail. At some point you'll have to walk on the very road because of a fence surrounding a canal, but you can climb back over the guardrail after that. At the end of the off-ramp, you'll have to walk on the motorway again, but it's just a very short distance, and a part of it is ever sheltered by a concrete divider. The gas station is just a few meters down the road.