Highest motorway in England

Whoever told me that kids like to sleep in cars was lying - Isobel manages to stay awake singing for hours! Means we can't eat our cake until she goes to sleep otherwise she just shouts and shouts demanding some. Even baa baa won't work in that situation.
 
Anyway, Peter told me a random fact as we headed over Saddleworth moor on the M62 - that we were on the highest bit of motorway in England. Can't be true I thought. But a bit of investigating and it seems it is (1442 ft above sea level to be precise).  A few pictures if you're not familiar with it: