Greater Houston's arterial road network is established at the municipal level, with the City of Houston exercising planning control over both its incorporated area and extraterritorial jurisdiction (ETJ). Therefore, Houston exercises transportation planning authority over a 2,000-square-mile (5,200 km2) area over five counties, many times larger than its corporate area.[270] The Major Thoroughfare and Freeway Plan, updated annually, establishes the city's street hierarchy, identifies roadways in need of widening, and proposes new roadways in unserved areas. Arterial roads are organized into four categories, in decreasing order of intensity: major thoroughfares, transit corridor streets, collector streets, and local streets.[270] Roadway classification affects anticipated traffic volumes, roadway design, and right of way breadth. Ultimately, the system is designed to ferry traffic from neighborhood streets to major thoroughfares, which connect into the limited-access highway system.[270] Notable arterial roads in the region include Westheimer Road, Memorial Drive, Texas State Highway 6, Farm to Market Road 1960, Bellaire Boulevard, and Telephone Road.

The increased production of the expanded shipbuilding industry during World War II spurred Houston's growth,[34] as did the establishment in 1961 of NASA's "Manned Spacecraft Center" (renamed the Lyndon B. Johnson Space Center in 1973). This was the stimulus for the development of the city's aerospace industry. The Astrodome, nicknamed the "Eighth Wonder of the World",[35] opened in 1965 as the world's first indoor domed sports stadium.

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