in line

in line (http://definr.com/in line)

     adj 1: being next in a line of succession; "he was in line for the
            presidency"
     2: awaiting something; especially something due; "people were
        in line at the checkout counter"; "she was in line for
        promotion"
     adv : one behind another in a line or queue; "they waited in line
           for the tickets"