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Chapter 4 - San Marcos Tomorrow Thoroughfare Plan I Major Thoroughfare Plan Contents The Major Thoroughfare Plan of San Marcos Horizons describes a transportation system designed to improve mobility, especially in the east-west direction, for the next decade. The Major Thoroughfare Plan is presented on the following page. The Thoroughfare Plan contains a classification system which includes the following functional classes of roadways: . Expressways; . Major Arterials; . Minor Arterials; and . Collectors. Expressways I Expressways are devoted entirely to traffic movement which serve high volume, high speed travel within and through the urban area. They are characterized by multi-lane, divided roadways with a high degree of access control and few, if any, intersections at grade. The Thoroughfare Plan contains two types of expressways: .. Freeways are roads witlllimited access a...~ld frontage roads. lli-35 is the only free'\"lay on the Thoroughfare Plan. Planned improvements include widening the main lanes to 8 lanes and upgrading all access roads to 3 lanes. . Parkways are roads with limited access and no frontage roads. Planned FM 110 is the only parkway on the Thoroughfare Plan. It is a proposed loop around San Marcos and will provide access for movement from IH-35 to State Highways 123, 80, 21, and Ranch Road 12. Major Arterials I Major arterials are streets and highways that provide a high degree of mobility, serve relatively high traffic volumes, have high operational speeds, and serve a significant portion of through travel or long-distance trips. Major arterials serve as primary routes through the City of San Marcos and between major destinations within the area. They are continuous over long distances and serve trips entering and leaving the area as well as trips within the area. These facilities generally serve high volume travel corridors that connect major traffic generators, but lower volume roadways that are continuous over long distances may also function as major arterials, particularly in fringe and rural areas. Major arterials form an interconnecting network for citywide and regional movement of traffic including connections to freeways and expressways, and to minor arterials and collectors. Since traffic movement, not land access, is the primary function of major arterials, access management is essential. San Marcos Horizons (Draft: September 17, 2004) 4-15