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|Numbered Highway Systems of Sierra|
Highway shields for Interprovincial 1, K.S. Route 91, K.S. Scenic Route 16, and Gold Coast Provincial Route 138
|Formed:||March 15, 1949|
|Interprovincials:||Interprovincial X (I-X), K.S. Route X|
Numbered highways in Sierra are split into four primary types of systems, the Interprovincial Highways, K.S. Highways, provincial highways, and county highways. Other systems include the National Park Highways, Scenic Route Highways, and Reservation Highways. All highways are organized by a route number and/or a letter, often related to its general cardinal orientation (north-south, west-east) and geographic location. These designations are physically displayed through the form of highway shields.
One of the world's largest highway network, the modern Sierran highway project began in 1949 in response to Sierra's growing demographics and infrastructure. Deemed one of the most ambitious projects in human history, by 1980, nearly 10,000 miles of roads were built or under construction.
The Interprovincial Highway and K.S. Highway Systems are a network of highways that transverse over multiple provinces built to standardized regulations and specifications and is overseen by the federal government. Ultimately, all highways, especially the provincial highways, are the responsibility of the provinces themselves who maintain all roads and highways subject to their jurisdiction. As such, virtually all of the provinces have departments, agencies, and law enforcement bodies dedicated solely for the maintenance, upkeep, and protection of the highway systems.
The Interprovincial Highway System was the first national highway system commissioned by the Parliament on March 15, 1949 under the direction of Queen Angelina I. A network of controlled-access highways, both it and the K.S. Route Highways follow the Sierran Royal Association of Highway and Transportation Officials' standards and regulations. Much of the Interprovincial Highways were constructed prior to 1975 where from that year on, most new national highways became part of the K.S. Route Highway System. Using the same standards, highways from either systems are virtually indistinguishable.
|Number||South or west terminus||North or east terminus||Length (mi)||(km)||Formed||Deleted||Became|
|K.S. SR 16 in Santa Monica, Gold Coast||I-1 at Brazoria-Sierra border||635.3||1,022.42||April 2, 1956||—||April 2, 1956||First Interprovincial formed|
|GC-47 / Gaffey Street in San Pedro, Gold Coast||Glenarm Street in Pasadena, Gold Coast||31.82||51.21||March 3, 1942||—||April 9, 1967||Concurrent with GC-110|
|PN Route 1 in Laguna-Pacífico Norte border line at Tijuana||I-5 in Columbia-Sierra border line||796.432||1,281.733||September 19, 1903||—||April 2, 1956|
|K.S. SR 16 near El Segundo, Gold Coast||I-2C in Norwalk||18.82||30.29||July 4, 1971||—||August 5, 1984|
|I-2 in Irvine, Orange||I-2 near San Fernando, Gold Coast||72.415||116.541||May 13, 1967||—||August 5, 1984|
|K.S. 22/I-2B in Seal Beach, Orange||GC 41 / Huntington Dr in Irwindale, Gold Coast||27.40||44.10||July 9, 1941||—||August 5, 1984|
|I-2 in San Diego, Laguna||DR 2 in Mohave-Deseret border at St. George||446.846||719.128||August 13, 1947||—||April 2, 1956|
I-3 in Murrieta, Inland Empire
I-3 in San Bernardino, Inland Empire
|55.060||88.610||April 9, 1963||—||September 5, 1982|