Possible Clues:

• You'll find it in Meath heading north, and south!
• Northern transport in Meath
• To the North it will carry goods in Meath
• From the North a vehicle may get there in Meath
• Either way, join in me at H
• Get up and down there in Meath with transport at last
• Below the North, transport in Meath
• After the North transport will go up and down in Meath
• Where in Ireland one goes North with transport either way
• Where you'll find transport at last 18 down