ones the interstate and ones the state
Interstate is used to connect states and State highways are used to connect citys in the state
They are indicated by the letters that proceed the number. Example is I5 would be interstate 5 CA 15 would be state 15. Note that connecting routes betweeen interstate highways can be counted as interstate.
Highways are roads that are usually maintained by the local government (or even the state - never federal) but the funding for the highway can come from the federal government. State highways never cross state lines. US highways do cross state lines. US highways were established to create paths for travel where the road number does not change from state to state. This was done to make interstate travel easier and was mandated by congress in the 1930s if memory serves me correctly. Freeway is a road that has NEVER been a toll road and NEVER will be. Interstate - highway that crosses state lines and is not a US highway. This is a seperate act of congress and was established in the 1950s to create highways that were limited access and were designed for those traveling long distances on a regular basis. EDIT*** I looked at the definitions for freeway, expressway (you didn't ask, but I looked anyhow), etc. and it seems as though there is a small bit of confusion relating to this specific definition of the word freeway. True, the answer below does appear to be factual, but I do seem to recall a state that has designated a definition of a freeway as the one I provided, but I am unable to find the site that stated this (I have seen this and not in a dream). For all intents and purposes however, it appears as though the most common definition for a freeway is a limited access, divided highway. It also appears that a highway is an undivided road (based on the definition of the other terms). In the US, it's a matter of who pays for them. The federal government pays for the interstate highways. They can look very similar, e.g., both can have ramps for heavy traffic. From the source links: The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly called the Interstate Highway System or Interstate Freeway System, and colloquially referred to as "the Interstate", is a network of limited-access roadways (also called freeways, highways, or expressways) in the United States. It is named for President Dwight D. Eisenhower, who championed its formation. As of 2006, the system has a total length of 46,876 miles (75,440 km).[1] The Interstate Highway System is a subsystem of the National Highway System. The National Highway System (NHS) of the United States comprises approximately 160,000 miles (256,000 kilometers) of roadway, including the Interstate Highway System and other roads, which are important to the nation's economy, defense, and mobility. It is the world's longest highway system. The system, which was developed by the United States Department of Transportationin cooperation with the states, local officials, and metropolitan planning organizations was approved by the United States Congress in 1995. It encourages individual states to focus on strategic routes support these with federal funds where the States can incorporate design and construction improvements that address their traffic needs safely and efficiently.
I-75 South to Macon; I-16 East to Savannah
None Because Interstate 95 Is Not Real
The Interstate Highway System runs through Georgia connecting major cities like Atlanta, Macon, and Savannah. Key interstates in Georgia include I-20, I-75, and I-85, providing important transportation routes throughout the state and linking Georgia with the rest of the country.
Signage is the only reliable way to tell. State highways will have a state highway sign (what that looks like varies from state to state), while interstate highways will have the blue and red interstate shield.
interstate
Alaska does not have an interstate highway as an interstate highway requires 4 lane divided road connected at the very minimum state. Alaska is separated from the 48 other states. Thus can not have an interstate highway. Alaska has state highways and it has national scenic routes but are not able to have an interstate highway.
Interstate 40.
The major highways in the state of Iowa are Interstate 35 and Interstate 29. They join the north and south part of the state. Interstate 80 and Interstate 380 join the east and west side of the state.
Interstate Highway 93, Interstate 95 and Interstate 89.
That depends on which state and which type of road you had in mind. There'll be a major difference in speed limits between an Interstate Highway in Texas and an unmarked crown road in Delaware.
California
California
Yes
California
In the United State of America you have to be at least 16 years of age to drive on the interstate or highway. This may very in different states