Changes

In front of the Husseini mosq (end of King Faisal street), find a bus that goes to Wehdat (0.35 JOD) by asking to the drivers. Tell them you want to go to Zizia (Al Jizah on some maps). From the bus stand in Wehdat, find a bus to Zizia (Al Jizah). Maybe you won't get a direct bus but the drivers will indicate you where to transfer (one transfer only, prices 0.35+0.50 JOD).Once on the second bus to Zizia (Al Jizah), wait for the interchange. Once you've passed the interchange, you will be on the highway 15 direct to Petra/Aqaba. Once in the highway 15 (Desert Highway) you can ask to get off the bus anywhere and basically hitch by stopping any car or truck directly on the highway. There's is also a service station Total just after the interchange, you may can ask to get off there (it's a good spot).