WYEs are given odd numbers if the connecting SR is odd numbered, and even numbers if the connecting SR is even numbered. ... odd-numbered. Unlike 2-digit US routes, there was never a guideline stating that 3-digit routes should run in a particular direction -- that is, no stipulation that north/south branch routes should be assigned odd numbers (so as to be considered branches of north/south main routes), and that even numbers should be given to east/west branch routes. REV - Reverse side of divided highway. Interchanges are numbered sequentially. Interchanges are numbered sequentially. North and South. One- or two-digit odd-numbered Interstates are always north-south routes. Even numbered highways (40, 66, etc) always run east to west, from side to side on the map. 3. A federal law designates all odd-numbered national highways as north and south, and all even-numbered highways as west and east. This was done so no state had two highways with the same number to avoid confusion. ... Interstate Highways were numbered so that they would not conflict with the preexisting U.S. Numbered System; ... Interstates must be constructed with at least two 12-foot lanes of traffic in each direction. Auxiliary spur routes that deviate from the parent route but will return later will be given a 3'rd number at the beginning. Three-digit numbered interstates are generally localized highways that intersect with a one- or two-digit interstate. Even-numbered highways run east-west. Odd numbers shall be used on the southerly side of named right-of-ways extending in an easterly and westerly direction and on the westerly side of named right-of-ways extending in a northerly and southerly direction. Highways running north-south are odd-numbered, while highways running east-west are even-numbered. Odd-numbered highways run north to south. The highways that run north to south have odd-numbers, as in U.S. 81. Odd numbers run north-south, starting with I-5 along the West Coast and increasing numerically to I-95 along the Eastern Seaboard. Odd numbered highways are north south, even numbered=east west? In the case of the auxiliary system, each highway has a special number that indicates its parent highway. The north-south highways have odd numbers with 1 or 2 digits, usually including a 5. Other roads have odd numbers, and are roughly in the same range as even numbers nearby. White lines. D = DECREASING - Milepost decreases when traveling the roadway in the decreasing direction. National highway numbers to ... people to get accustomed to the new numbers, in the long run this will prove ... numbers and those running in the east-west direction will be in odd numbers. even-numbered. The even-numbered interstates, such as 40, 70, and 80, run east and west.Those with odd numbers, such as 5, 25, and 95, are north-south routes. interstate routes heading east or west. 4. The numbering system is really quite simple. The Interstate highway system began in the late 1950s as a network of four-lane (two lanes in each direction) roads that connect major cities, without intersections and without traffic signals. For example, I-5 is on the West Coast, I-95 on the East Coast. Odd-numbered highways generally run. In 1957, the red, white, and blue shield symbol for the interstates' numbering system was developed. There are some exceptions to this rule. Contrastingly, even numbered US highways normally run in an approximate east-west direction. Number of through lanes (this does not include auxiliary, truck climbing and turning lanes). 3. The first interstates were begun in 1956. The longest Interstate Highway in the US is the I-90. In the case of irregular named right-of-ways, the front-ages shall be numbered as near as may be according to the Geographic location. Odd numbers are given to properties on the left and even numbers to those on the right. This third number will tend to be even. erly direction. Odd-numbered interstate highways run north-south, with higher numbers farther east: I-5 runs from Bellingham, Washington to San Diego, California. Direction. You hope it doesn’t happen, but it is inevitable that at some point, you might get a flat tire. The shared left turn lane on certain multi-lane highways can be used to. There are 70 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. Generally, a road is numbered from south to north or east to west. Highways that run north to south will have an odd route number, like I-95, while interstates that run east to west will have an even route number, like the famous Route 66. Here’s how to keep calm and drive on. The lowest numbers are in the west and in the south. Odd-numbered highways (e.g., Interstate 15) run north-south and even-numbered highways (e.g., Interstate 80) east-west. 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