When I replaced my driveway I put 6 sleeves under it (2 water, 3 line voltage and a 2" for LV, phone, cable or whatever. One thing I did to help find them in 20 years is to cut a small triangle wedge of wood that points in line with the sleeve on both ends and nailed inside the form. It took a few minutes on my table saw to get them cut right. Now I have a notch in the edge of the concrete at each entrance and exit. As long as your sleeves don't cross you just count them down from the end.