In 1905, the Bartlett Webster developing company extended streetcar service through South Park, ushering in a period of rapid growth.
In 1912, North Park's first high-rise, known today as the Western Dental Building, was built on the corner of 30th Street and University Avenue.
[4] However, as was seen in many urban areas throughout the United States, white flight and suburbanization in the latter half of the 20th century devastated many communities along the 30th Street corridor.
[5] Across its communities, 30th Street has seen many shops, cafes, bars, and restaurants open in the last decade contributing to high rates of pedestrian activity.
Throughout these neighborhoods, 30th Street features high levels of pedestrian activity relative to most of San Diego due to its density of cafes, restaurants, bars, and shops.
The 30th Street trolley bridge also was originally an underpass for a rail line that ran from downtown San Diego to El Cajon, CA.