Interstate 70 in Missouri
I-70 highlighted in red
|Maintained by MoDOT|
|Length||250.063 mi (402.437 km)|
|West end||I-70 / US-24 / US-40 / US-169 at Kansas state line|
|East end||I-70 at Illinois state line|
|Counties||Jackson, Lafayette, Saline, Cooper, Boone, Callaway, Montgomery, Warren, St. Charles, St. Louis, City of St. Louis|
In the U.S. state of Missouri, Interstate 70 (I-70) is generally parallel to the Missouri River. This section of the transcontinental Interstate begins at the Kansas state line on the Lewis and Clark Viaduct, concurrent with U.S. Routes 24, 40, and 169, and the east end is on the Stan Musial Veterans Memorial Bridge in St. Louis.
Crossing into Missouri on the Lewis and Clark Viaduct, I-70 immediately encounters the Alphabet Loop, a small but complex loop of freeways with all of its exits having a number of 2 and a letter suffix that uses the entire alphabet (except I, O, and Z). I-70 becomes concurrent with I-35 once it enters into the Loop. Both interstates maintain the concurrency until they approach the northeastern corner of the Loop. Back at the northwest corner, US 169 splits off to the north, leaving four routes concurrent with each other. There is a large interchange with Route 9 in the Loop's northeastern corner. At that corner, US 24 splits to the east, I-29 ends, and US 71 joins.
Once it leaves I-35, I-70 turns south, with interchanges to more roads. At the southeastern corner, I-70, US 40, US 71 all exit the Loop. I-70 and US 40 split off to the east, and US 71 continues south. I-670 ends at the alignment. Not long after they usurpt that alignment, I-70/US 40 turn southeast. US 40 departs from I-70 at exit 7A. I-70 then interchanges with I-435, the beltway around Kansas City.
While passing through Kansas City, I-70 is known as the "George Brett Super Highway", named after former Kansas City Royals third baseman and Baseball Hall of Fame member George Brett. The Truman Sports Complex, which houses the Royals' and Chiefs' stadiums, is located adjacent to the I-70/I-435 interchange.
Independence to Wentzville
East of I-435, I-70 continues east through Independence, passing a busy cloverleaf interchange at I-470. The highway then continues with six lanes to the rapidly growing suburb of Blue Springs, where the roadway narrows to four lanes (two each direction) at Route 7. I-70 remains at this width until just west of the intersection with I-64/US 40/US 61 in Wentzville, over 170 miles (270 km) away.
East of Blue Springs, I-70 takes on a rural highway as it leaves Jackson County. The highway remains this way for the next 100 miles (160 km), going through gently rolling terrain while it meets US 65 at a cloverleaf interchange and finally crossing the Missouri River at Rocheport just west of where it reaches the mid-sized college town of Columbia in the center of the state. Through Columbia, the highway is lined with restaurants and hotels and can get congested during University of Missouri sporting events. The highway leaves Columbia after an exit with St. Charles Road on the east end of town. East of Columbia, I-70 has an interchange with US 54 at Kingdom City, Route 19 at New Florence, and Route 47 at Warrenton. Then, it continues through more gently rolling terrain until it reaches Wentzville, where it meets I-64/US 61. Here, US 40 departs from I-70. It then expands to three lanes each direction to St. Louis.
This section needs expansion. You can help by adding to it. (June 2008)
It crosses over the Missouri River one last time on the Blanchette Memorial Bridge, which is actually made up of two bridges: the westbound span built in the late-1950s and refurbished in 2013 and the eastbound one completed in the late-1970s.
Traffic volume increases as I-70 enters St. Louis County, requiring more lanes. There are as many as 13 lanes at one point. The section of I-70 from Fifth Street in St. Charles to I-270 is among the busiest section of highway in the state, with AADT counts approaching 165,000 in 2005.
I-270 draws much of the traffic, so I-70 continues east through Bridgeton with only six lanes. After interchanges with Route 180 (St. Charles Rock Road) and US 67 (Lindbergh Boulevard), it passes on the southern edge of Lambert–St. Louis International Airport and through several bedroom communities – including Edmunson, Berkeley, Ferguson, and Jennings – and crossing I-170 in the process.
As it finally enters the city of St. Louis, motorists encounter what are signed as the "Express Lanes", known by MoDOT as the "reversible lanes". Two lanes in the middle of the freeway are separated from the eastbound and westbound lanes by Jersey barriers. Due to traffic pattern changes caused by the I-64 reconstruction, the lanes travel eastbound all day. MoDOT regularly monitors traffic patterns of this stretch of I-70 and will adjust the express lane traffic patterns accordingly. These lanes have no entrance or exit ramps, except at the ends. They extend approximately 8 miles (13 km) from near Union Boulevard to just north of downtown.
Just before it enters downtown St. Louis, I-70 turns to the east to cross the Stan Musial Veterans Memorial Bridge, which redirects the highway's traffic away from the congested Poplar Street Bridge two miles (3.2 km) to the south. This 2-mile stretch of former I-70 is now an extension of I-44.
I-70 had been criticized for cutting off downtown St. Louis from the Mississippi River waterfront particularly at the Gateway Arch. St. Louis constructed a $90 million project to cover the highway (now I-44) by the Arch.
This was not the first controversy involving I-70 and the Arch. In 1959, builders of the Poplar Street Bridge asked for the National Park Service to give 25 acres (10 ha) of the park for the bridge. The request generated enormous controversy and ultimately 2.5 acres (1.0 ha) was turned over to use for the bridge.
The New Mississippi River Bridge was finished and opened to traffic on Sunday, February 9, 2014. It reroutes and redirects I-70 traffic off the congested Poplar Street Bridge. The bridge was named in honor of St. Louis Cardinals baseball legend Stan Musial.
I-70 across central Missouri is one of the oldest stretches of Interstate Highway in the system, as some sections date back as far as the late 1950s. As a result, the exits often have short, substandard acceleration and deceleration ramps, and the median is relatively narrow. Certain spots of both directions of traffic are separated by no more than a Jersey barrier. Also, a number of overpasses have low clearance, especially railway overpasses. Long-term plans have been identified to expand the highway to between six and eight lanes across the middle of the state. Tolling the Interstate has become a possible alternative, although the public does not support this idea.
A March 2010 study of I-70 from the Kansas state line to the I-470 interchange identified several possible improvements, including expansion of the freeway from four to eight lanes, adding HOV or HOT lanes, reconstructing the Truman Road interchange and improving the curves at Jackson Avenue and Truman Road. Some novel ideas included a new alignment of I-70 as a tunnel from the southeast corner of the downtown loop to 22nd/23rd streets, covering the southern portion of the downtown loop (I-670) or making the downtown loop into a uni-directional freeway around downtown, essentially becoming a large roundabout.
The Missouri Hyperloop is a proposed high speed transportation route that would complement and relieve Interstate 70.
|Jackson||Kansas City||0.000||0.000||I-70 west / US-24 west / US-40 west / US-169 south – Topeka||Continuation into Kansas|
|2A||I-35 south – Wichita||Western end of I-35 / Downtown freeway loop concurrency|
|0.845||1.360||2B||Beardsley Road||Eastbound exit and westbound entrance|
|1.060||1.706||2C||US 169 north (Arrowhead Trafficway) / Broadway Boulevard – Downtown||Eastern end of US 169 concurrency|
|1.303||2.097||2D||Main Street / Delaware Street / Wyandotte Street||Signed as Main Street only eastbound|
|1.651||2.657||2E||Route 9 north / Oak Street||Westbound access is via exit 2H|
|2G||I-29 / I-35 / US 71 north / US 24 west – St. Joseph, Des Moines||MoDOT signs this as southern terminus of I-29; eastern end of I-35 and US 24 concurrencies; western end of US 71 concurrency; signed as exit 2G–H eastbound|
US 24 Bus. east to Route 9 / Admiral Boulevard
|Westbound exit only|
|2.273||3.658||2J||11th Street||Eastbound exit and westbound entrance|
|2.668||4.294||2K||Harrison Street / Troost Avenue||Westbound exit and eastbound entrance|
|2L-P||I-670 west (I-70 Alt.) to I-35 south (13th Street Downtown) – Topeka, Wichita||13th Street Downtown signed westbound exit only|
|2M||US 71 south – Joplin||Eastern end of the Bruce Watkins Drive Memorial Parkway; eastern end of US 71 and Downtown freeway loop concurrency; I-670 exit 2N; westbound access is via exit 3A|
|14th Street / Charlotte Street||Eastbound entrance only|
|2.944||4.738||3A||To US 71 / The Paseo (Kansas City, Missouri)||I-670 exit 3A; no eastbound exit from I-70 east; no westbound entrance to I-670 west|
|3.389||5.454||3B||Brooklyn Avenue||Eastbound exit and westbound entrance|
|4.135||6.655||4A||Benton Boulevard / Truman Road||Eastbound exit and westbound entrance|
|5.447||8.766||5A||27th Street||Eastbound exit and westbound entrance|
|5.578||8.977||5B||31st Street||Eastbound exit only|
|5.756||9.263||5C||Jackson Avenue||Westbound exit and eastbound entrance|
|6.493||10.449||6||Van Brunt Boulevard|
|7.053||11.351||7A||US 40 east / 31st Street||Eastern end of US 40 overlap|
|8A–B||US 24 east / I-435 – Wichita, Joplin, Kansas City, Des Moines||I-435 exits 63A-B; signed as exits 8A (south) and 8B (north)|
|9.338||15.028||9||Blue Ridge Cutoff – Truman Sports Complex||Westbound exit and eastbound and westbound entrance; Eastbound exit 9 via exit 8A; will open in 2020|
|10.848||17.458||10||Sterling Avenue||Eastbound exit only|
|11||US 40 (Blue Ridge Boulevard)|
|14.093||22.680||14||Lee's Summit Road|
|15||I-470 south / Route 291 – Lee's Summit, Liberty, Wichita||I-470 exits 16B–C; signed as exits 15A (south/west) & 15B (north)|
|16.613||26.736||17||Little Blue Parkway / 39th Street|
|Blue Springs||18.563||29.874||18||Blue Springs, Lake Tapawingo, Fleming Park|
|20.392||32.818||20||Route 7 – Blue Springs, Lake Lotawana|
|21.625||34.802||21||Adams Dairy Parkway – Blue Springs|
|Grain Valley||24.412||39.287||24||US 40 west / Route AA west / Route BB north – Grain Valley, Buckner||Western end of US 40 concurrency|
|Oak Grove||28.169||45.334||28||Route F south / Route H north – Levasy, Oak Grove|
|Lafayette||Bates City||31.431||50.583||31||Route D north / Route Z south – Bates City, Napoleon|
|Odessa||36.665||59.007||37A||Action Road - Outlet Mall||Eastbound exit only; access to Shops at Odessa; attached to exit 37B|
|36.989||59.528||37B||Route 131 – Odessa, Wellington||Signed as exit 37 westbound; no eastbound entrance—eastbound entrance is via exit 38|
|38.252||61.561||38||Johnson Drive||Westbound exit and eastbound entrance|
|||41.173||66.262||41||Route M south / Route O north – Lexington, Mayview|
|||45.382||73.035||45||Route E south / Route H north – Mayview, Fayetteville|
|Higginsville||49.387||79.481||49||Route 13 – Higginsville, Warrensburg|
|||52.839||85.036||52||Route T north – Aullville|
|Concordia||58.569||94.258||58||Route 23 – Waverly, Concordia|
|Saline||Emma||62.574||100.703||62||Route VV north / Route Y south – Emma|
|Sweet Springs||66.891||107.651||66||Route 127 – Sweet Springs, Mt. Leonard|
|||71.383||114.880||71||Route EE north / Route K south – Houstonia|
|||74.606||120.067||74||Route YY north|
|||78.173||125.807||78||US 65 – Sedalia, Marshall||Signed as exits 78A (south) and 78B (north)|
|Cooper||||89.918||144.709||89||Route K north / Route M south – Arrow Rock, Blackwater|
|||98.000||157.716||98||Route 41 north / Route 135 south – Arrow Rock, Pilot Grove|
|Boonville||101.781||163.801||101||BL I-70 east / US 40 east / Route 5 south (Ashley Road) – Boonville, Tipton||Eastern end of US 40 concurrency|
|103.551||166.649||103||Route B (Main Street) – Boonville, Bunceton|
|Windsor Place||106.382||171.205||106||BL I-70 west / Route 87 (Bingham Road) – Boonville, Prairie Home|
|||111.455||179.369||111||Route 98 / Route 179 south – Overton, Wooldridge|
|Missouri River||114.714||184.614||Rocheport Interstate 70 Bridge; Cooper–Boone county line|
|Boone||||115.505||185.887||115||Route BB north / Roby Farm Road – Rocheport|
|||117.687||189.399||117||Route J north / Route O south – Huntsdale, Harrisburg|
|||121.178||195.017||121||US 40 west / Route 240 west / Route UU south – Fayette||Western end of US 40 concurrency|
|Columbia||124.398||200.199||124||Route 740 east (Stadium Boulevard) / Route E north||Access to the University of Missouri and University Hospital|
|125.543||202.042||125||BL I-70 east / West Boulevard / Creasy Springs Road|
|126.545||203.654||126||Route 163 (Providence Road) – Downtown Columbia|
|127.019||204.417||127||Route 763 (Range Line Road) – Moberly|
|128.287||206.458||128||BL I-70 west||Westbound exit only as of 2018; eastbound traffic onto I-70 rerouted to I-70 Connector|
|128.887||207.424||128A||US 63 / BL I-70 east / Route PP – Jefferson City, Moberly||Indirect access via I-70 Connector; BL I-70 not signed|
|130.984||210.798||131||St. Charles Road / Lake of the Woods Road|
|||133.644||215.079||133||Route Z north / Range Line Road – Centralia|
|Callaway||||137.729||221.653||137||Route DD north / Route J south – Millersburg|
|||144.193||232.056||144||Route HH south / Route M north – Hatton|
|Kingdom City||147.963||238.123||148||US 54 – Auxvasse, Mexico, Fulton, Jefferson City, Lake of the Ozarks|
|||155.426||250.134||155||Route A north / Route Z south – Bachelor, Calwood|
|||161.318||259.616||161||Route D south / Route YY south – Williamsburg|
|Montgomery||||170.374||274.190||170||Route 161 north / Route J south – Danville, Montgomery City|
|New Florence||174.975||281.595||175||Route 19 – New Florence, Hermann|
|High Hill||179.797||289.355||179||Route F north – High Hill|
|Jonesburg||183.780||295.765||183||Route E north / Route Y south – Jonesburg|
|Warren||||188.445||303.273||188||Route A north / Route B south – Truxton|
|Warrenton||192.121||309.189||192||Route MM north / West Warrenton Boulevard||Roundabouts serve as access points to collector roads that direct to Route MM and Veterans Memorial Parkway; West Warrenton Boulevard is the newly created road, that serves as the overpass|
|Truesdale–Warrenton line||193.484||311.382||193||Route 47 – Warrenton, Hawk Point|
|Wright City||198.962||320.198||199||Route H – Wright City|
|200.000||321.869||200||Route F south / Route J north – Wright City||Westbound exit and eastbound entrance; other half of interchange is via exit 199|
|St. Charles||Foristell||203.750||327.904||203||Route T south / Route W north – Foristell|
|Wentzville||206.586||332.468||206||David Hoekel Parkway||Exit is set to open in 2020 or 2021|
|209.412||337.016||209||Route Z south / Church Street – New Melle|
|210||I-64 east / US 40 east / US 61 (Avenue of the Saints) – Chesterfield, St. Louis, Wentzville, Hannibal||Eastern end of US 40 concurrency; signed as exits 210A (east/south) and 210B (north); I-64 exit 1; western terminus of I-64|
|Lake St. Louis||211.948||341.097||212||Route A north / Freymuth Road|
|213.950||344.319||214||Lake St. Louis Boulevard|
|217.759||350.449||217||Route K south / Route M north (Main Street) – O'Fallon||Westbound exit is via exit 218|
|218.433||351.534||218||Terra Lane / Sonderen Street||Westbound exit and entrance; other half of interchange is set to open in 2019[needs update]|
|218.929||352.332||219||T.R. Hughes Boulevard / Belleau Creek Road|
|St. Peters||220.381||354.669||220||Route 79 north / Salt Lick Road – Elsberry, Louisiana|
|222.098||357.432||222A||Mid Rivers Mall Drive|
|222.262||357.696||222B||Veterans Memorial Parkway / Suemandy Drive||Eastbound exit only|
|224||Route 370 east||Route 370 exit 0|
|225.129||362.310||225||Cave Springs Road / Harry S Truman Road|
|St. Charles||226.933||365.213||227||Zumbehl Road|
|228.277||367.376||228||BL I-70 east (First Capitol Drive) / Route 94 – St. Charles, Weldon Spring|
|229.143||368.770||229A||Convention Center Boulevard / Fairgrounds Road||No eastbound entrance|
|229.379||369.150||229B||BL I-70 west (Fifth Street) – St. Charles|
|Missouri River||230.128||370.355||Blanchette Memorial Bridge; St. Charles–St. Louis county line|
|St. Louis||Maryland Heights||231.507||372.574||231A||Route 141 south (Maryland Heights Expressway)||Cloverleaf interchange|
|231B||Route 141 north (Earth City Expressway)|
|Maryland Heights–Bridgeton line||232.222–|
|232||I-270 – Chicago, Memphis||I-270 exit 20; signed as exits 232A (south) and 232B (north) westbound; Parclo interchange|
|Bridgeton||234.180||376.876||234||Route 180 (St. Charles Rock Road)|
|235.096||378.350||235||US 67 (Lindbergh Boulevard)||Signed as exits 235A (south) and 235B (north)|
|235.626||379.203||235C||Route B (Natural Bridge Road) / Cypress Road – Lambert-St. Louis International Airport|
|Edmundson||236.729||380.978||236||Pear Tree Drive / Natural Bridge Road / Airflight Drive / Lambert International Boulevard – Lambert-St. Louis International Airport|
|Berkeley||237.627||382.424||237||Route 115 east (Natural Bridge Road)||No westbound exit|
|238.068||383.133||238A||Lambert-St. Louis International Airport||Westbound exit and eastbound entrance|
|238||I-170||Signed as exits 238B (south) and 238C (north); I-170 exit 7|
|239.783||385.893||239||Hanley Road||Westbound exit is via exit 240|
|Cool Valley||240.393||386.875||240||Route N (Florissant Road / University Boulevard) / North Hanley Road||North Hanley Road not signed eastbound|
|Northwoods–Norwood Court line||241.691||388.964||241B||Route U (Lucas & Hunt Road)|
|Pine Lawn||242.774||390.707||242||Jennings Station Road|
|City of St. Louis||243.09||391.22||243A||Goodfellow Boulevard||Eastbound access via exit 242|
|243.345||391.626||243B||Route 367 north (Riverview Boulevard)||Westbound exit only|
|244.062||392.780||243C||Bircher Boulevard||Eastbound exit only|
|244.255||393.090||244A||Union Boulevard / Kingshighway|
|—||I-70 Express Lanes – Downtown||Eastbound exit only; westbound entrance closed in 2009; western end of express lanes|
|244.579||393.612||244B||Kingshighway Boulevard||Westbound exit and eastbound entrance; eastbound access via exit 244A|
|245.643||395.324||245B||West Florissant Avenue|
|246.111||396.077||246A||Carrie Avenue||Formerly signed as North Broadway and O'Fallon Park|
|248.068||399.227||248A||Route 115 west (Salisbury Street) – McKinley Bridge||Access to IL 3|
|248.515||399.946||248B||Branch Street||Westbound exit only|
|248.755||400.332||248C||St. Louis Avenue||Eastbound exit and entrance|
|249.274||401.168||249A||I-44 west to I-55 south – Tulsa, Memphis||Former route of I-70 through Downtown St. Louis|
|249.335||401.266||249B||To Historic US 66 (Tucker Boulevard) – Downtown St. Louis||Signed as exit 249 westbound; no westbound entrance|
|249.840||402.079||292B||Broadway||Eastbound exit only for Express Lanes; exit number based on I-44 mileage|
|I-44 west to I-55 south – Tulsa, Memphis||Eastern end of Express Lanes; eastbound exit only for Express Lanes; eastern terminus of I-44|
|Mississippi River||250.063||402.437||Stan Musial Veterans Memorial Bridge; Missouri-Illinois state line|
|I-70 east to I-55 north / I-64 east – Indianapolis||Continuation into Illinois|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Missouri Department of Transportation (April 12, 2014). MoDOT HPMAPS (Map). Missouri Department of Transportation. Retrieved April 12, 2014.
- Google (July 8, 2007). "Alphabet Loop" (Map). Google Maps. Google. Retrieved July 8, 2007.
- Google (July 8, 2007). "A closer look of the Loop" (Map). Google Maps. Google. Retrieved July 8, 2007.
- Google (July 8, 2007). "Northern part of the Loop" (Map). Google Maps. Google. Retrieved July 8, 2007.
- Google (July 8, 2007). "Northeastern corner of the Loop" (Map). Google Maps. Google. Retrieved July 8, 2007.
- Google (July 8, 2007). "Eastern part of the Loop" (Map). Google Maps. Google. Retrieved July 8, 2007.
- Google (July 8, 2007). "I-70 between the Loop and US 40" (Map). Google Maps. Google. Retrieved July 8, 2007.
- Google (July 8, 2007). "I-70 at I-435" (Map). Google Maps. Google. Retrieved July 8, 2007.
- Google (July 24, 2007). "I-70 at I-470" (Map). Google Maps. Google. Retrieved July 24, 2007.
- "I-70 at Route 7". Microsoft TerraServer. United States Geological Survey. February 28, 1996. Retrieved July 24, 2007.
- Google (July 24, 2007). "I-70 at the Missouri River near Columbia" (Map). Google Maps. Google. Retrieved July 24, 2007.
- Google (July 24, 2007). "I-70 at US 63" (Map). Google Maps. Google. Retrieved July 24, 2007.
- "I-70 Reversibles To Remain Eastbound All Day" (Press release). Missouri Department of Transportation. January 21, 2009. Retrieved January 30, 2009.
- City leaders pitch local control of Arch grounds – St. Louis Post Dispatch – August 29, 2007 Archived January 31, 2008, at the Wayback Machine
- Sharon A. Brown. "Jefferson National Expansion Administrative History". National Park Service. Retrieved October 4, 2014.
- "New Mississippi River Bridge Project". Newriverbridge.org. August 18, 2011. Retrieved September 19, 2011.
- "The Facts". Improve I-70. Missouri Department of Transportation. Retrieved July 24, 2007.
- "Draft I-70 First Tier Environmental Impact Statement (FTEIS)" (PDF). Missouri Department of Transportation. Archived from the original (PDF) on July 27, 2011. Retrieved March 30, 2010.
- Media related to Interstate 70 in Missouri at Wikimedia Commons