How are county roads numbered in Missouri?

In Missouri, odd-numbered highways run north-south and even-numbered highways run east-west (with a few exceptions, such as Route 112). Missouri also maintains a secondary set of roads, supplemental routes, which are lettered rather than numbered.

What do highway symbols mean?

A highway shield or route marker is a sign denoting the route number of a highway, usually in the form of a symbolic shape with the route number enclosed. As the focus of the sign, the route number is usually the sign’s largest element, with other items on the sign rendered in smaller sizes or contrasting colors.

What do the numbers on the back of road signs mean?

In most places in the U.S. they indicate which side of the street a building is, odd for one side, even for the other. The size of the number tells how far from a designated point. Sometimes these are marked N. or S. or E. or W., if the street runs both directions from the designated point.

What is an SSR road?

Secondary State Road/Route. SSR. Supply Services Requirement.

How do you read a highway route sign?

Generally, north/south highways have odd numbers that get higher from east to west, while east/west ones have even numbers that get higher from north to south. Major routes mostly end in 1s and 0s while three-digit numbers tend to represent secondary or spur highways.

What is the difference between a loop and a spur?

Spur Interstate routes have three-digit numbers with an odd first digit. A subsidiary route either passing through a city or bypassing it and then reconnecting to a major highway would receive an even first digit, and be considered a loop rather than a spur.

What do broken white lines tell you?

White lane markings are the most common. Solid white lines define lanes of traffic going in the same direction, or they show you the location of the shoulder of the road. Broken or “dotted” white lines are used to show the center line between lanes. Yellow lines show you where traffic is going in different directions.

Why are highways numbered?

To prevent duplication within a State, a progression of prefixes is used for the three-digit numbers. For example, if I-80 runs through three cities in a State, circumferential routes around these cities would be numbered as I-280, I-480, and I-680.

Why are the interstates numbered?

The number of digits tells you whether an interstate connects multiple metro areas, or exists solely within a single metro area. One and two-digit interstates span multiple regions, while three-digit interstates are more local. The rest of the system flows from this most basic starting point.

What does a winding road sign look like?

Winding road signs are diamond-shaped with a yellow background and black symbols. Placed in advance of 3 or more successive curves in the road.

What is trumpet interchange?

The trumpet interchange allows for interchange of secondary two-way streets to a multi-lane roadway with minimal traffic mix. It takes the place of a T-intersection which is often used when a roadway ends at the intersection of another roadway.

What does it mean if an interstate has a 3 digit number starting with an even number?

In a typical 3-digit Interstate Highway, bypasses usually have both its two termini junctioned with another Interstate highway. Bypass routes are preceded by an even number in the first digit. Examples include: I-220 in Louisiana serves as a bypass of downtown Shreveport.

What do route numbers mean?

A route (or road) number, designation or abbreviation is an identifying numeric (or alphanumeric) designation assigned by a highway authority to a particular stretch of roadway to distinguish it from other routes and, in many cases, also to indicate its classification (e.g. motorway, primary route, regional road, etc.) …

What is exit ramp?

(ˈɛksɪt ræmp) noun. a short roadway by which vehicles may leave a major highway.

What are short one-way ramps used to get off the highway called?

Entrance ramps are short, one-way ramps used to get on the highway. At the end of most entrance ramps is an acceleration lane.

What is highway intersection?

An intersection or an at-grade junction is an junction where two or more roads converge, diverge, meet or cross at the same height, as opposed to an interchange, which uses bridges or tunnels to separate different roads.

What is an exit only lane?

The “Exit-Only Lane at Exit Ramp” figure shows a vertical highway with five lanes of one direction of a divided highway, four lanes of which continue through past an exit ramp, and the rightmost of which angles off to the right to become the exit ramp.

What are the rumble strips called?

sleeper lines
Rumble strips, also known as sleeper lines, audible lines, “the corduroy”, growlers, and “woo woo” boards, are a road safety feature to alert inattentive drivers of potential danger, by causing a tactile vibration and audible rumbling transmitted through the wheels into the vehicle interior.

What is the deceleration lane?

Deceleration lanes allow traffic exiting a major street to slow down to a safer speed to make a left or right turn at an intersection without affecting the main flow of traffic. … These lanes continue a freeway entrance ramp into an additional freeway lane; this becomes an “exit only” lane at the next downstream exit.

Why do some exits say exit only?

If the sign is on the highway, then you are guaranteed a return to the interstate – it may not be straightforward, but it will be there. The “Exit Only” means that this lane is only for exit, and it does not allow further (straight through) travel.

Is highway A hypnosis?

Highway hypnosis commonly occurs when driving on open highways for an extended period of time. In this condition, the driver operates the vehicle in a dulled, drowsy, trance-like state. Always be aware of your surroundings and to avoid falling asleep behind the wheel, take frequent breaks.

What is a Velocitation?

Velocitation is a phenomenon caused by driving for long periods at high speeds. A driver may experience velocitation when coming off of the highway; the change in speed makes him or her think that the car is going much slower than it actually is.

Why do some exits have letters?

Exit numbers correspond to the nearest milepost. If there is more than one interchange or exit ramp within a mile, suffixes A, B, C, etc. are added to the exit numbers to distinguish them. When multiple interstate highways run concurrently (overlap), just one of them gets priority for mileposting and exit numbering.