The problem with brick used in this way is that it will not resist frost action- that is the brick is likely to become saturated during winter and with hard frost the brickwork crumbles (spalling is the technical term) over time. This is a problem with any natural clay brick used as a kerb, coping etc in an exposed situation. There are frost resistant bricks available but these are more expensive. You would also find that clay bricks are not as mechanically strong as precast concrete kerbs or paviors- they will tend to chip over time. For this reason where vehicles are involved I would always specify a precast conc. kerb or pavior designed to withstand vehicular traffic- thus the price differential. Brickwork kerbs and edgings are fine for lawn and garden edgings where vehicles are not an issue.