Now transportation is more and more convenient, more and more people have cars, and even one person owns more than one car. But this also caused traffic jams, so the overpass came into being.

Overpasses with complex and multi-intersections play a very important role in relieving traffic pressure and diverting vehicles.

The "Judge Harry Pregerson" flyover in Los Angeles was built in 1993.

The road design of this overpass is so dazzling that it is impossible to see the route of the bridge from the pictures. This overpass has a total of 4 layers of roads, and there are as many as a dozen ramps.

Some people laughed and said that this is "heaven knotted with ropes tens of meters thick". A series of intricate roads make this overpass the most complex overpass in the world.

In 1996, the Federal Highway Administration approved the decision to open Interstates 105 and 110 at the Judge Harry Pregerson Overpass.

They also presented the Highway Design Award for the complex overpass, recognizing the overpass' design and merits of alleviating traffic congestion and improving surrounding air quality.

The main purpose of this overpass is to connect the new world highways in the United States. The overpass was designed by the California Institute of Transportation and the National Institute of Transportation.

The overpass also has three integrated modes of transportation: expressways, light rail trains, and urban vehicles. The biggest, tallest, and most expensive is also the design concept of this overpass.

There is also a famous overpass in Tennessee, which is also one of the ten most congested roads in the United States. The overpass, called "DALLAS MixMaster", started construction in 1958 and was completed in 1962.

On this overpass, as long as you take the wrong intersection, you may be out of the city, because some of the exits of this overpass are connected to the interstate highway.

Once you enter and then exit, you will not know which city you are in.

Drivers who came here for the first time said that it was a very adventurous journey to come to Dallas. Many times, navigation fails on this overpass.

All directions start with "Get on Beltline", and the most terrifying thing is that all roads have no beginning and no end. This overpass is also often congested. Generally, the morning peak is from 6:00 to 10:00, and the evening peak is from 15:00 to 19:00.

The traffic jam time is as long as 8 hours! The reason for the traffic jam is simple when you see the car ahead signaling to turn, he has likely gone the wrong way.

Because everyone is lost, they can only turn their heads to find the right direction. Only drivers who have driven here for a long time can be familiar with the entire route.

This overpass was also built for 800 million US dollars that year, connecting two expressways and 23 roads.

It is because there are too many people complaining about the trouble caused by this overpass, the city government decided to build a new intersection, and the completion of the project will also close some infrequently used intersections to ease the traffic pressure here.

Not only in the United States, but the United Kingdom also has an overpass that makes people dizzy.

The Mount Graves overpass covers an area of 30 acres with 18 lanes. The elevated road together with the approach bridge is 4 kilometers long, supported by 559 cement columns on 6 floors, with a maximum height difference of 24.4 meters.

Engineers raised the 13.5-mile highway to accommodate two railroad lines, three canals, and two rivers.