The city uses the grid plan but there are several different grids in place, as the city was originally thirteen separate municipalities and each developed under different circumstances and under different rules. Although it is common for roadways running north-south to be called "streets" and those running east-west to be called "avenues", the practice is far from universal, and few roadways run in a precise cardinal direction; an "east-west" road may run at a 45 degree angle from true east-west. Attempts in the early 20th century to bring order to the system by giving numerical names to the streets failed; all roadways in the city have proper names, some of which are repeated. (There is, for instance, a Wellington Crescent in River Heights and a Wellington Avenue in the West End, and a Killarney Avenue in Fort Garry and a Killarney Street in St. Vital.)