- M621 between A62 SPUR and M62, Kirklees (Grid ref SE235278)
- M621 between M62 and A650(SPUR), Leeds (Grid ref SE236280)
- M621 between A650 SPUR and RD SPLIT, Leeds (Grid ref SE242280)
- M621 between A62 and SPUR, Leeds (Grid ref SE250279)
- M621 between RD SPLIT and J1, Leeds (Grid ref SE265296)
- M621 between J1 and J2, Leeds (Grid ref SE280314)
- M621 between J2 and J2A, Leeds (Grid ref SE289316)
- M621 between J2 and J3, Leeds (Grid ref SE289316)
- M621 between J2 and J3, Leeds (Grid ref SE289316)
- M621 between J2A and J3(SPUR), Leeds (Grid ref SE293319)
- M621 between J3 (SPUR) and A653, Leeds (Grid ref SE298322)
- M621 between J3 (SPUR) and J3, Leeds (Grid ref SE300321)
- M621 between M621 and Meadow Road roundabout, Leeds (Grid ref SE300320)
- M621 between J3 (SPUR) and J4, Leeds (Grid ref SE302319)
- M621 between J5 and J6, Leeds (Grid ref SE305306)
- M621 between J4 and J5, Leeds (Grid ref SE305315)
- M621 between J43 and J44, Leeds (Grid ref SE310305)
- M621 between J7 and M1, Leeds (Grid ref SE321295)