Interstate 435 or I -435 is an Interstate Highway in the U.S. state of Missouri. The highway forms a 130 kilometer long ring road around the city of Kansas City, of which 88 kilometers is located in the state of Missouri. Interstate 435 in Kansas forms the remainder of the route.

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Travel directions

The interchange between I-70 and I-435 in eastern Kansas City (reconstructed in 2020).

Interstate 435 in Kansas crosses the Missouri border in northern Kansas City, which is formed by the Missouri River. The interstate then intersects State Route 152, an east-west highway to Liberty. The highway then runs west of Kansas City International Airport and merges with Interstate 29, the highway to Omaha. Both roads will then be double-numbered with 2×3 lanes until the airport, where I-29 exits into downtown Kansas City while I-435 continues east, passing north of Kansas City. The northern part also has 2×3 lanes and you then cross the US 169, the northern artery of Kansas City. Then I-435 turns south and you enter civilization again. It again crosses State Route 152 and then Interstate 35, the highway to Des Moines. After that, 2×3 lanes are available and the Missouri River is crossed for the second time.

At Arrowhead Stadium, one crosses Interstate 70, the highway to St. Louis. The highway then has 2×4 lanes and continues south. On the southeast side of Kansas City, one crosses Interstate 49, the highway to Fort Smith in Arkansas. The highway then turns to the west and has 2×3 lanes. This then widens to 2×4 lanes. After Exit 75 you reach the border with Kansas again after which Interstate 435 in Kansas continues to Overland Park and the western suburbs.

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History

Construction history

The first section to open was US 71 in 1954, which later became I-29, and later became part of I-435 in the far north of Kansas City. At that time, however, it was not yet a fully-fledged highway, it was not upgraded to Interstate Highway design requirements until the mid-1960s . The first section of I-435 itself opened in 1966 on the east side of Kansas City, between I-70 and what was then US 50(today State Route 350). In 1968 this stretch was extended both north and south. In 1969 a large lot opened along the south side of Kansas City. This completed the highway along the south side of the city first. This is where the most growth took place at the time. In the north of Kansas City, growth was not going well, so this part was postponed. In 1973, the eastern section between I-35 and US 24 opened, including the bridge over the Missouri River. It was not until the 1980s that the northern portion of the ring road was constructed, which was completed in 1987 with the opening of both northeast and northwest Kansas City, including a bridge over the Missouri River.

Opening history

Widenings

Kansas City’s south ring road was built in 1966 as a 2×3 lane highway. In the period 1983-1994, the south ring road on the Missouri side was gradually widened from 2×3 to 2×4 lanes. In 2018-2020 this corridor was modernized with new bridges and full left lanes, but no extra lanes. This stretch of I-435 is the second busiest stretch of highway in the Kansas City area.

In the period 2002-2004, the interchange between I-435 and I-49 was reconstructed. The eastern ring road between I-49 and I-29 already had 2×3 lanes everywhere before 1990. In the period 2000-2010, various minor adjustments were made to the highway, mainly due to the construction of weaving sections and longer entry and exit lanes. The northern ring has undergone little adjustment since it opened, with cloverleaves still outdated, but because there has been little suburbanization around this part of I-435, the capacity here is still more than adequate.

In 2019-2020, the interchange with I-70 has been reconstructed into a partial turbine interchange. The original interchange was a bow tie with left outs on I-435. The wide lane split of I-435 near the interchange has also been changed to a regular location of the lanes next to each other. The new turbine arches opened on July 23, 2020. This was the first turbine junction in Kansas City.

Traffic intensities

The northern portion of the ring road is extremely quiet with only 18,000 to 23,000 vehicles in 2×3 lanes. After I-35, the intensities rise sharply, from 66,000 to 82,000 in 2×4 lanes. The southern portion is the busiest with 109,000 vehicles in 2×4 lanes. The I-435 is therefore very spacious in capacity and traffic jams are therefore virtually non-existent.