I'd assume he means upright iron rods inserted at intervals, usually set inside the piers, to stop the wall falling over if it cracks/gets hit etc. If set inside a pier, the whole pier would be filled with cement.
They are banged in vertically and concreted in the wall footing. The pier or double skin wall is then built around the iron uprights. More relevant in this case as it meets the highway/neighbouring boundary and we don't want it falling over and hurting anybody do we. 
Quite plausible
BUT

If your banging in rods at the front of a house , you need to be pretty sure your missing the gas, electric, sewer and water

As for reinforcing it to stop it being damaged by a car hitting it , the wall will be damaged and need rebuilding anyway
so if your worried , fit an armco "wall"

Any wall needs a good foundation ,suitable for ground conditions ,loading etc , many people re-build garden walls on weak, thin or existing foundations that will fail again