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3.
when on a long trip, your female companion provides sexual favors to help pass the miles, in particular a blow job.
three truckers did not notice my doing 75 mph while getting a road job from Sally
by geeman45 June 07, 2006
 
1.
Oral sex given to the driver of a moving vehicle. Usually given by a female companion riding shotgun.
Kris: "Did you see how slow Gil was going through that intersection?"

Roland: "Yeah, he must of been getting one good road job."
by Gil Semple January 25, 2008
 
2.
A blowjob received while driving a moving vehicle.
"Shan gave me a roadjob on the drive back to her house last night."
by The RJ recipient October 25, 2004