Before the construction of I-70, there were two routes between Kansas City and St. Louis, US 40 via Columbia and US 50 further south via Jefferson City, the capital of Missouri. Ultimately, it was decided not to have I-70 run via Jefferson City, but further north via Columbia, in the corridor of US 40. The main reason is that this was an easier route, US 40 mostly runs through flat terrain while US 50 more through hilly terrain around the Missouri River, particularly between Jefferson City and St. Louis.
- SEARCHFORPUBLICSCHOOLS: Provides a list of all public primary and high schools in Missouri, including street address, contact phone, and zip code for each school.
Construction on Interstate 70 in Missouri began on August 13, 1956, around St. Charles, just west of St. Louis, an area that was then rural. The Blanchette Bridge was the first new bridge of the Interstate Highway system. The rest of the highway was built fairly quickly after that, because of the priority that this corridor had between Kansas City and St. Louis. The highway between the two cities was completed in 1966 when the last section opened in Russell County. Before I-70 opened, it took 8 hours to drive from Kansas City to St. Louis, the construction of Interstate 70 made it possible in half the time. The section in what are now the suburbs of St. Louis was completed in the late 1950s, the section through St. Louis itself opened to traffic in the early 1960s. On November 9, 1967, the Poplar Street Bridge in St. Louis opened over the Mississippi River. The Blanchette Bridge over the Missouri River at St. Charles opened in two phases, the first span in 1958 and the second in 1978.
- USPRIVATESCHOOLSFINDER.COM: Provides a list of all private primary and elementary schools in Missouri, including street address, contact phone, and zip code for each school.
I-70 has express lanes in St. Louis, originally a 2-lane toll-free interchangeable lane. This alternating lane was constructed immediately during the construction of I-70 in the early 1960s and was opened to traffic on August 22, 1961. This may have been the first alternating lane on a motorway in the world. Between 1998 and 2003, I-70 through St. Louis was modernized with all bridges replaced. The interchange was then closed for 5 years. Since December 2011, the interchangeable lane has been in permanent use towards the center and has been renamed to an express lane.
On February 9, 2014, the Stan Musial Veterans Memorial Bridge opened over the Mississippi River in St. Louis. The bridge shortens the distance from Interstate 70 in the state of Missouri by 2 kilometers. Since then, I-70 no longer runs along Downtown St. Louis, that route has since become I-44.
The Lewis and Clark Viaduct in Kansas City was completely replaced between 2018 and 2020 and was closed to the west for two years.
Between 2021 and 2024, I-70’s bridge over the Missouri River at Rocheport was replaced. The original bridge was sub -standard, this was a steel truss bridge with only 2×2 lanes and no emergency lanes. The bridge has been replaced by two 3-lane spans and an emergency lane, preparing for the planned widening of I-70 through Missouri. Construction began on October 12, 2021 and lasted until the end of 2024. The project cost $240 million.
|Exit 175||Exit 224||79 km||1958|
|Exit 228||Exit 234||10 km||09-1958|
|Exit 242||Exit 244||3 km||09-1958|
|Exit 248||Exit 250||3 km||03-1959|
|Exit 124||Exit 128||6 km||1959|
|Exit 224||Exit 228||6 km||1959|
|Exit 98||Exit 124||42 km||1961|
|Exit 243||Exit 248||7 km||28-07-1961|
|Exit 234||Exit 243||14 km||22-08-1961|
|Exit 37||Exit 49||19 km||1962|
|Exit 58||Exit 66||13 km||1962|
|Exit 128||Exit 148||32 km||1962|
|Exit 0||Exit 6||10 km||1963|
|Exit 5||Exit 11||10 km||1964|
|Exit 49||Exit 58||14 km||1964|
|Exit 66||Exit 98||51 km||1964|
|Exit 250||Exit 251||2 km||1964|
|Exit 11||Exit 37||42 km||1965|
|Exit 148||Exit 175||43 km||1965|
|Exit 251||Exit 252||1 km||1967*|
* renumbered to I-44 in 2014.
Verbreding Kansas City – St. Louis
For years, there has been a desire to widen I-70 between Kansas City and St. Louis in its entirety because of the high proportion of freight traffic. Various ideas have been suggested in the past, such as separate truck lanes. These are called “dedicated truck lanes” (DTL) and will have 2×2 lanes in the median strip with fewer connections. The highway will then have 4×2 lanes throughout Missouri. The number of trucks across the entire corridor was expected to increase from 10,000 to 25,000 trucks per day. Ultimately, the system would have to run all the way from Kansas City to Ohio. The cost was estimated at $2 – 4 billion and funding has not yet been found. It has been proposed several times to turn I-70 into a toll road.
I-70 in Kansas City.
The bridge over the Missouri River at Rocheport (replaced 2021-2024).
I-70 at Foristell, just west of St. Louis.
|Kansas state line||68.000|
|Exit 2A south||70.000|
|Exit 2G north||92.000|
|Exit 20 Blue Springs||70.000|
|Exit 28 Oak Grove||36.000|
|Exit 37 Odessa||29.000|
|Exit 49 Higginsville||19.000|
|Exit 66 Sweet Springs||23.000|
|Exit 78 Marshall||26.000|
|Exit 98 Arrow Rock||24.000|
|Exit 101 Boonville||28.000|
|Exit 106 Boonville||32.000|
|Exit 117 Huntsdale||31.000|
|Exit 121 Columbia||46.000|
|Exit 125 Columbia||73.000|
|Exit 128 Columbia||38.000|
|Exit 148 Mexico||31.000|
|Exit 175 New Florence||31.000|
|Exit 188 Truxton||34.000|
|Exit 200 Wright City||50.000|
|Exit 208 Wentzville||71.000|
|Exit 217 O’Fallon||117.000|
|Exit 220 St. Peters||139.000|
|Exit 228 St. Charles||138.000|
|Exit 229 St. Charles||155.000|
|Exit 231 Maryland Heights||141.000|
|Exit 241 Northwoods||115.000|
|Exit 243 St. Louis||92.000|
|Exit 0||Exit 2M||2×3||Kansas City|
|Exit 2M||Exit 3C||2×4||Kansas City|
|Exit 3C||Exit 20||2×3||Kansas City|
|Exit 20||Exit 214||2×2|
|Exit 214||Exit 228||2×3||St. Louis|
|Exit 228||Exit 232||2×5||St. Louis|
|Exit 232||Exit 244||2×3||St. Louis|
|Exit 244||Exit 249||3+2+3||St. Louis|
|Exit 249||Exit 250||2×3||St. Louis|