Look down, what do ya see - - - one or two feet. People did a lot of walking, even when they had oxen to pull carts, they walked alongside. The well to do might own horses and ride them and in fact to be a Knight meant having the financial means to own a horse and most costly of all maintain it. Horses have always cost money to maintain which is why the poor ride donkeys. In fact hewing to their interpretation of the Bible, Priest rode Donkeys & Mules, actually they called them by a name with an A and two S s but if I write that word the Yamsters will give me a violation notice....
Packhorses were common, see link below for a great illustration - -- -- the art of loading a horse with goods was quite a skill and once again most people walked along side.
Carts were simple and bone jarring for anyone riding on them. Two wheeled wagons were most common, loads of five hundred pounds or so the norm. Four wheeled carts were less common, and as for Scotland, wood was scarse hence the reliance on pack horses rather than horses or oxen lugging carts around. Dogs were also enlisted to pull carts thus the term 'dog cart,' see link below for the Osberg Cart which would have been known in Scotland..
Boats with a single mast and able to be propelled by oars were quite common again see link below for picture. On the larger rivers and lochs /estuarial lakes, a boat was easier to build then a bridge and being a Ferryman was a good steady job.
"""Drawing based on a English manuscript illustration of ca.1400, touching upon aspects of the economic system. In the foreground a packhorse, loaded with merchandize, is driven towards an inn (with welcoming hostess); a network of inns across the country was important for commerce. The building at lower right, with hanging sign indicating it some kind of commercial or industrial establishment, may represent a craft workshop that produced some of the goods being transported by the horse. At rear right, the artist has depicted a walled town, location of major marketplaces for goods, while at left stands a castle or fortifed manor-house – residence of aristocracy who were consumers of luxury goods imported by merchants. The packhorse reflects the role of land-based transportation in the economy, while the ships and boats represent the importance of water transportation""""
"""The intended use of my version of the Oseberg cart is for my dog or myself to pull it, as depicted in the Bayeaux Tapestry. This is a concept that governed several design choices. I first looked at photos and illustrations of the actual cart and I noticed that the front axle does not pivot, in fact it is rigidly attached to the frame in three places. The term pivot describes the lateral movement of the front axle which allows turning within a small radius (envision the traditional little red wagon). "
Great Picture Here
AND this site might prove helpful
""The majority of the information contained in these pages is the result of research undertaken prior to and continued during the writing of a novel set in 13th century Scotland. The novel has long since been shelved; the site lives on and continues to grow."""
"""Glasgow is also proud to offer the unique Museum of Transport. Inside, you will find an amazing array of displays on the history for both land and sea transportation.""
Peace........ /// ----- O i O ------ \\\ .............................z