Reference previous row to get value

I was able to get something to work by creating a Row ID using RANKX, and then another column (Prior Row ID) using EARLIER to get the previous Row ID. I then added this to my original Previous Odometer calculation as an additional filter:

Row ID := RANKX( ALL(Transactions[Transaction Date]), T ransactions[Transaction Date], , ASC, Dense)

Previous Row ID := CALCULATE

                                      (  

                                       MAX(Transactions[Row ID]),

                                       ALL(Transactions),Transactions[Vehicle #] = EARLIER(Transactions[Vehicle #]),

                                       Transactions[Transaction Date] < EARLIER(Transactions[Transaction Date])

                                      )

Previous Odoometer =
CALCULATE(

                    MAX(Transactions[Odometer #]),

                    ALL(Transactions),

                    Transactions[Vehicle #] = EARLIER(Transactions[Vehicle #]),

                    Transactions[Transaction Date] < EARLIER(Transactions[Transaction Date]),

                    Transactions[Row ID] = EARLIER(Transactions[Previous Row ID]) )
)

Curious to see if there is a much simpler way to achieve the same results....