According to the original Commissioner's Plan, there were 155 numbered crosstown streets, but later the grid was extended up to the northernmost corner of Manhattan, where the last numbered street is 220th Street. Moreover, the numbering system continues even in The Bronx, north of Manhattan, despite the fact that the grid plan is not as regular in that borough, whose last numbered street is 263rd Street. Fifteen crosstown streets were designated as wide, including 34th, 42nd, 57th and 125th Streets, which became some of the borough's most significant transportation and shopping venues. Broadway is the most notable of many exceptions to the grid, starting at Bowling Green in Lower Manhattan and continuing north into the Bronx at Manhattan's northern tip. In much of Midtown Manhattan, Broadway runs at a diagonal to the grid, creating major named intersections at Union Square (Park Avenue South/Fourth Avenue and 14th Street), Madison Square (Fifth Avenue and 23rd Street), Herald Square (Sixth Avenue and 34th Street), Times Square (Seventh Avenue and 42nd Street), and Columbus Circle (Eighth Avenue/Central Park West and 59th Street).