Balboa Park area. The charter high school e3 Civic High School is located inside the downtown library. The Monarch School, a public K-12 school for students who are homeless or affected by homelessness, is also located downtown. A few private or religious schools exist in the area. California Western School of Law is located downtown. Infrastructure Streets are laid out in a grid pattern and many are designated for one-way traffic. North–south roads have both names and numbers. The named roads begin with Harbor Boulevard and then move east past Pacific, Kettner, India, Columbia, State, Union and Front streets. The roads are then numbered and are called avenues, starting at 1st Avenue and continuing to Park Boulevard (12th Avenue). The general pattern is that even numbered streets head south, and odd numbered streets go north. East–west streets are laid out alphabetically from A to K, with the exception of D, H and I, which are replaced with Broadway, Market Street and Island Avenue, respectively. Streets north of A Street are named after trees, starting with Ash Street and going up to Laurel. Main thoroughfares include Broadway and Market Street (east–west), and Harbor Drive, Pacific Highway and Park Avenue (north–south). Three freeways either pass through or start/end in downtown San Diego. State Route 163 (SR 163) ends in downtown with the southbound lane of the freeway becoming 10th Avenue and 11th Avenue becoming the northbound lane at Ash Street. Interstate 5 (I-5) passes above the downtown area and is accessible from selected streets outside of the actual downtown area or at the intersection of 10th/11th and Ash (where 163 starts and ends). Additionally, SR 94 enters downtown from the east, with westbound SR 94 becoming F Street and G street becoming eastbound SR 94. The downtown area is served by the San Diego Metropolitan Transit System, the San Diego Trolley. There is also a commuter train linking downtown with northern San Diego County, called the Coaster, which also stops at communities along the San Diego County costaline, as well as the Amtrak passenger rail system. Parking is mainly concentrated in various "pay to park" lots, with metered parking spaces alongside most streets. There is also parking available at the County operation center (located between Harbor Drive and Pacific Highway, just north of Ash), as well as Horton Plaza and Seaport Village shopping areas. See also North Embarcadero Visionary Plan References External