Park has a high rate of pedestrian activity, relative to other regions of San Diego County. Publications The book North Park: A San Diego Urban Village has been published by the North Park Historical Society. It recollects the development of the neighborhood from 1896 to 1946, and includes an array of historic photos of the area. North Park calendars are published by the North Park Historical Society. The San Diego Uptown News covers North Park and surrounding communities. The North Park News is a local publication, delivered free of charge to North Park residents. North Park Main Street's website features Once Upon a Time in North Park articles, submitted by various writers from the North Park Historical Society. Transportation Transportation is served by Interstate 805, which is accessible from the University Avenue and El Cajon Boulevard exits. University Avenue and El Cajon Boulevard are the major east-west thoroughfares in North Park. University Avenue leads west to Hillcrest and east to City Heights and La Mesa. El Cajon Boulevard leads west to Washington Avenue and Mission Hills and continues east to the city of El Cajon. Florida Street connects North Park to Downtown San Diego through Florida Canyon in Balboa Park to the south, and to Adams Avenue and University Heights to the north. 30th Street connects North Park to Adams Avenue and Normal Heights to the north, and to South Park and Golden Hill to the south. Texas Street heads north directly into Mission Valley. There is substantial bus service (bus routes 1,2,6,7,10,11, and 215 connecting to Downtown San Diego as well as to the transportation hub in Old Town). The busiest bus line corridor in the San Diego metro region, known as the University Avenue transit corridor (bus routes 7 and 10), traverses North Park. Government and infrastructure Stephen Whitburn represents District 3. The United States Postal Service operated the North Park Post Office at 3791 Grim Avenue. This post office was closed in July 2011 due to budget cuts in the postal service. Organizations North Park Main Street: North Park's business community is also served by a business improvement district called North Park Main Street. North Park Community Association: Residents of North Park are served by the NPCA, an all-volunteer group that hosts free Bird Park Summer Concerts, runs a "Stop Graffiti Now!" campaign, connects neighbors who have common concerns, and promotes local businesses through its Member Discount