Local roads were often based on animal trails. Animal trails followed the shortest practical distance to water or a salt source. In other words, you need to think like a buffalo.
Interstates- even numbers are east-west, odd numbers are north-south, 3 digit numbers are bypasses around cities. In this case, you need to think like a buffalo with an engineering degree and a cousin in Congress.
Since you asked the question in Cincinnati, the road network is I-275 which is a loop, I-75 and I-71 which runs north-south.
If you want to understand how the highway system works in the U.S., I-5 runs north-south in CA. If the highway starts with an odd number and ends in an odd number, the highway runs north-south.
If the highway begins with an even number and ends in an even number, it runs east-west.
If the highway is three digits and begins with an even number and ends with an odd number, it is a looped highway.
This is how it works with an interstate highway. Local highways do not necessarily follow this rule.
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On which level? Local, State or National?
Local roads were often based on animal trails. Animal trails followed the shortest practical distance to water or a salt source. In other words, you need to think like a buffalo.
Interstates- even numbers are east-west, odd numbers are north-south, 3 digit numbers are bypasses around cities. In this case, you need to think like a buffalo with an engineering degree and a cousin in Congress.
Since you asked the question in Cincinnati, the road network is I-275 which is a loop, I-75 and I-71 which runs north-south.
If you want to understand how the highway system works in the U.S., I-5 runs north-south in CA. If the highway starts with an odd number and ends in an odd number, the highway runs north-south.
If the highway begins with an even number and ends in an even number, it runs east-west.
If the highway is three digits and begins with an even number and ends with an odd number, it is a looped highway.
This is how it works with an interstate highway. Local highways do not necessarily follow this rule.
You did not ask a question. What do you want to know about the road network in the USA?