US Interstate Highways
This article is a travel topic
For many trips, the interstate highways are the most efficient way to travel by automobile between two points. Being limited access highways, interstates do not have traffic lights except on rare occasions. They typically have speed limits of 55 miles per hour (89 km/h) or more - portions of I‑10 and I-20 in rural western Texas and portions of I‑15 in rural central Utah have a speed limit of 85 mph (137 km/h) - and are well maintained.
The number that is assigned to an interstate highway has a specific meaning in identifying its purpose:
This order of numbering is opposite from the U. S. Route System in order to avoid overlap of identical numbers. There is currently one instance of an interstate highway and a U.S. route of identical numbering overlapping: I-74 and US-74 in North Carolina. There is also a section of US-41 in Wisconsin that is proposed to become a section or I-41.
Types of signs
Like most other roads, all interstate highways have speed limits. The limits, which are controlled and enforced by the respective states where they are located, can vary, depending on the laws of that state, the volume of traffic, and other factors. Typical speed limits range from 55-75 miles per hour, though there are exceptions both above and below this.
Tolls exist on some interstates. The tolls could be either for the highways themselves or for bridges along the highways.
Some of the tolls on Interstate Highways for cars are (this list is currently incomplete, not always up to date, and may vary from prices listed by time of day or method used to pay):
New Jersey: George Washington Bridge has a toll of $8 while traveling in a northbound direction.
Delaware: between exit 1 (DE-896) and exit 109 in Maryland (MD-279), there is a $4 toll in each direction. This toll is described by signs as being for the entire Delaware Turnpike, though it only needs to be paid if traveling between these two exits. The toll can be avoided southbound by taking exit 1 north, turning left on Christiana Parkway (DE-4/896), and left on Elkton Road (DE-2/MD-279), then re-entering I-95, or the reverse while traveling northbound. This takes an additional 10 minutes.
Maryland: The Millard Tydings Bridge over the Susquehanna River has a $5 toll for northbound travelers.
The Delaware Memorial Bridge has a $4 toll for those traveling southbound
On many interstates are rest areas where motorists can stop to take breaks. Rest areas are usually equipped with rest rooms, and many have various other facilities to meet the needs of travelers.