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Interstate 70 (I-70) is an Interstate Highway in the United Statesmarker that runs from Interstate 15 near Cove Fort, Utahmarker, to a Park and Ride near Baltimore, Marylandmarker. It was the first Interstate Highway Project started in the United States. I-70 approximately traces the path of U.S. Route 40 (and also the old National Road) east of the Rocky Mountains. West of the Rockies, the route of I-70 was cobbled together from a variety of sources.

The construction of I-70 in Colorado and Utah is considered an engineering marvel where the route passes through the Eisenhower Tunnelmarker, Glenwood Canyonmarker, and the San Rafael Swellmarker. The Eisenhower Tunnel is the highest point along the Interstate Highway system with an elevation of .

The sections of the interstate in Missouri and Kansas have laid claim to be the first interstate in the United States. The final piece of Interstate 70 was opened to traffic at Glenwood Canyonmarker in 1992. Most people considered this to be the last piece of the Interstate Highway System as originally planned to be opened .

Route description

Utah

Interstate 70 begins at an interchange with Interstate 15 near Cove Fortmarker.Heading east, I-70 crosses between the Tushar and Pahvant ranges via Clear Creek Canyon and descends into the Sevier Valley where I-70 serves Richfieldmarker, the only town of more than a few hundred people along I-70's path in Utah.Upon leaving the valley near Salinamarker I-70 crosses Salina Summit and then crosses a massive geologic formation called the San Rafael Swellmarker.

Prior to I-70's construction the swell was relatively undiscovered and inaccessible via paved roads. Once this section was opened to traffic in 1970, it became the longest stretch of Interstate Highway with no services and the first highway in the U.S. built over a completely new route since the Alaska Highway. It also became the longest piece of interstate highway to be opened at one time.Although opened in 1970, this section was not formally complete until 1990 when a second steel arch bridge spanning Eagle Canyon was opened to traffic.
Since I-70's construction the swell has been discovered for its desolate beauty. The swell has since been nominated for National Park and/or National Monument status on multiple occasions. If the swell is granted this status it arguably would be the first time a National Park owes its existence to an Interstate Highway. Most of the exits in this span are view areas, brake check areas, and Runaway truck rampswith few traditional freeway exits.

I-70 exits the swell near Green Rivermarker.From Green River to the Colorado state line I-70 follows the southern edge of the Book Cliffs.

Colorado

Entering from Utah, I-70 descends into the Grand Valley where it meets the Colorado Rivermarker, which provides its path up the western slope of the Rocky Mountains.Here I-70 serves the Grand Junctionmarker metro area before traversing more mountainous terrain.It passes through the 15 mile (24 km) section of I-70 through Glenwood Canyonmarker, which was the last section of I-70 to be completed.This stretch was completed in 1992 and was an engineeringmarvel due to the extremely difficult terrain and narrow space in the canyon, which requires corners that are sharper than normal Interstate standards. Construction was delayed for many years due to environmental concerns. The difficulties in building the road in the canyon were compounded by the fact that a railroad occupied the south bank and many temporary construction projects took place to keep U.S.Route 6open, at the time the only east-west road in the area. Much of the highway is elevated above the Colorado Rivermarker.The speed limit in this section is 50 mph (80 km/h) due to the limited sight distance and sharper corners. Great care was taken to not destroy the local ecosystem with the building of the road. All rest areas through this stretch use reclaimed water.

The Eisenhower Tunnelmarker, the highest vehicular tunnel in the world and the longest tunnel built under the Interstate program, passes through the Continental Divide.Because of the Eisenhower Tunnel's existence, I-70 is one of few roads connecting ski resorts such as Copper Mountain, Beaver Creek and Vail with Denvermarker and it is more likely to be open than alternative roads.After traversing the mountainous terrain, I-70 goes through Denvermarker and intersects Interstate 25.Leaving Denver, I-70 traverses through wide plains through east central Colorado before exiting into Kansas.

A section of the highway is displayed in the video game Syphon Filter 2as an escape route for the protagonist. I-70 between Denver and Glenwood Springs is the focus of Powder Chimpthe first Google Earth Plugin application to combine traffic, weather and web cam feeds and part of a grassroots effort to avoid the imposition of tolls on that section of the Interstate.

Bicyclists are permitted to use the shoulder lane of I-70 in portions of Colorado; this is one of the few sections of Interstate Highway where non-motorized vehicles are permitted to use the road.

When leaving the Rocky Mountains, the Denver skyline can be seen on a clear day. This can fool truckers and other unsuspecting drivers because there is still over of steep grade road before reaching the city. A series of signs warn truckers of the steep grade.

Kansas

Coming from Colorado, I-70 enters flat plains in Kansas. This portion of I-70 was the first segment to start being paved and to be completed in the Interstate Highway System. It is given the nickname "Main Street of Kansas" as the interstate extends from the western border to the eastern border covering and passing through most of the state's principal cities in the process.

I-70 crossing on the Lewis & Clark Viaduct over the Kansas River from Kansas to Missouri in Kansas City.
In Salinamarker, I-70 intersects with I-135, the longest "spur" route in the Interstate system, forming the latter's northern terminus.

In Topekamarker, I-70 intersects I-470, twice.At the eastern intersection, the Kansas Turnpikemerges, with I-70 becoming a toll road. This is one of only two sections of I-70 that are tolled. (The other is part of the Pennsylvania Turnpike.) I-70 carries this designation from Topeka to Bonner Springsmarker, the eastern terminus of the turnpike.There is also a third child route in Topeka, I-335, which runs from I-470 south to meet up with I-35 in the Flint Hills town of Emporia. Just past the Bonner Springs Toll Plaza I-70 crosses I-435 for the first time, which allows travelers to bypass the downtown traffic via I-435, which encircles the Kansas City metropolitan area. Further down the highway in Kansas City, Kansas, approximately before the 18th Street Expressway, I-70 is intersected again by another child route. This route, I-635, runs from I-35 at its southern terminus up to I-29, just about across the Missouri river, at its northern terminus. From I-635 to just past the 7th Street (US 169) exit, I-70 runs adjacent Union Pacific'sArmourdale Yard. Here I-670(also designated "Alternate 70" on some signs) diverges, providing a more direct route that rejoins I-70 proper a few miles east in Missouri. The highway passes over the former stockyards and rail yard when it crosses the Kansas Rivermarker on the Lewis & Clark Viaduct into downtown Kansas City, Missouri.

Missouri

After crossing the Lewis & Clark Viaduct, I-70 enters Missouri. It encounters a loop of freeways, called the Alphabet Loopmarker, which contains I-70 as well as I-35, I-670, U.S.24, U.S.40, U.S.71, and U.S.169. In the southern part of this loop, I-670 cuts directly through the downtown while I-70 bypasses the taller buildings a few blocks north near the Missouri River. Westbound I-670is also designated Alternate I-70 making this the only permanent "alternate" interstate in the country. Most of the interstates in this loop are in their second mile, so all exits (no matter the which interstate carries the road) are numbered 2 and suffixed with every letter of the alphabet except I, O and Z.

The section of I-70 in Downtown Kansas Cityis approximately the southern city limits of "City of Kansas" when it was incorporated in 1853. The first two auto bridges in Missouri mark the city's original boundaries with the Broadway Bridge (U.S.Route 169) being the west boundary while the Heart of America Bridge(Route 9) is the east boundary. Another intersection of note is the second traverse of I-435. This is primarily notable because it immediately precedes the Truman Sports Complexmarker (home of both Arrowhead Stadiummarker and Kauffman Stadiummarker) and also because the entrance ramps from I-435 northbound onto I-70 eastbound also serve as the exit ramps from I-70 into the Truman Sports Complex parking lots.This section of the Interstate is marked as the "George BrettSuper Highway", named after the Kansas City Royalsthird baseman who played the entirety of his career (1973-1993) at "The K". The last interstate intersection in the immediate Kansas City metro area is with I-470 in Independencemarker.

After passing Kansas City, I-70 traverses the length of Missouri, west to east. It passes through the largest city between Kansas City and St. Louis, Columbiamarker, which is about halfway between the two major cities, and the home of the University of Missourimarker.The terrain is rolling with some hills and bluffs near rivers. I-70 also crosses the Missouri Rivermarker twice (as did the original US 40)--at Rocheportmarker, about west of Columbia, and at St. Charles, about northwest of St. Louis.Most of the highway on this stretch is four-lane. Various proposals have been made to widen it (at an estimated cost of $3.5 billion) including turning it into a toll road. I-70 eventually gets into the St. Louis metro area and U.S.Route 40splits to the south, along with U.S.Route 61, which does not have a concurrencywith I-70. The intersecting road will be upgraded to Interstate standardsbecause of the upgrade to Interstate 64. After this interchange, I-70 intersects two child routes, I-270and I-170. I-70 then heads into the city limits of St. Louis, designated "The Mark McGwireHighway" after the Cardinals former first baseman (1997-2001), who hit 70 home runs in 1998 to break the single season record set by Roger Marisin 1961, allowing the number 70to take on greater significance in St. Louis. It continues south to intersect with I-64, U.S.40, and I-55, which then become concurrent as they head east to cross the Mississippi River on the Poplar Street Bridgemarker.

The 1985 World Series between the Kansas City Royals and St. Louis Cardinals was nicknamed the "I-70 Series" because St. Louis and Kansas City are the two endpoints of I-70 in Missourimarker and the highway passed both Busch Stadiummarker and Royals Stadiummarker.

Illinois

After crossing the Poplar Street Bridgemarker, I-64 splits off, while I-55 and I-70 stay concurrent.When they intersect I-270, I-55 stays on its own pavement using the mileposts from the Poplar Street Bridge, while I-70 heads east on I-270's pavement using I-270's mileposts. So when I-55/70 intersects I-270 from the southeast, the exit numberswould be 20 A/B, whereas if I-70 intersects I-55/270 from the east, it would be exits 15 A/B.

I-70 does not pass through any major cities in Illinois. It does run concurrent with Interstate 57 around Effinghammarker.I-70 then proceeds east towards Indiana.

Indiana



I-70 enters Indiana just to the west of Terre Hautemarker and then crosses the Wabash River before skirting the south side of that city.After passing through many miles of gently rolling terrain in rural west-central Indiana, the freeway approaches the major metropolitan area of Indianapolismarker.

The main entrance to Indianapolis International Airportmarker was relocated to I-70's exit #68 on November 11, 2008.It is significant to note that the ramp leading eastbound I-70 motorists to the counter-clockwise (southbound) lanes of I-465 and the multiplexed eastbound I-74 is now located at exit (and mile marker) #69, which you encounter just after entering Marion Countymarker.This places it about distant from the destination freeway (which is still crossed just prior to mile marker 73), likely making this one of the longest ramps on the entire Interstate System.

Upon nearing the central business district of Indiana's capital city, the visage of Lucas Oil Stadiummarker, with the city's skyline as its backdrop, now dominates the view to the north from the freeway.After passing just to the south of the world headquarters for Eli Lilly & Co., I-70 and Interstate 65, have a brief multiplexthrough the eastern side of downtown Indianapolis. The junction points of these two major routes are known locally as the south splitand north splitrespectively.

It is also noteworthy that the other 2-digit Interstates serving Indianapolis do not reach the city's core. As a result, I-70 motorists must use the I-465beltwayin order to reach I-69without leaving the Interstate System, while those similarly bound for I-74access that route via its multiplexaround the southern portion of the I-465 loop.

After passing through much of the near northeast side of Indianapolis, I-70 again encounters the I-465beltway (which carries a multitude of unsigned U.S. and Indiana state routes). I-70 continues on nearly due east from this point, first traveling through suburban Indy, then transitioning into rural east central Indiana, where it passes just to the south of the city of New Castlemarker.Upon reaching the Richmondmarker area, U.S.35joins I-70 just before both routes leave the Hoosier State together and enter Ohio.

Ohio

Interstate 70 enters Ohiomarker just east of the interchange with U.S.40 at Richmond, Indianamarker.Immediately to the east of this border, travelers notice a unique teal-blue arch that spans the width of the freeway, with a "Welcome to Ohio" greeting sign above the eastbound lanes. A sign thanking travelers for visiting Ohio is mounted on the other side of the arch for westbound travelers. Continuing eastbound, I-70 intersects Interstate 75 north of Daytonmarker, followed by I-675 on the east side of Dayton.Springfieldmarker is the next city, site of Buck Creek State Park.

I-70 and I-71 intersection in Columbus, Ohio.
I-70 then encounters the largest city in Ohio, Columbusmarker.Columbus is bounded by I-270, and is roughly centered around the intersection of I-70 and Interstate 71, which share the same asphalt through a notoriously congested stretch locally known as the "South Innerbelt" or, more commonly, "The Split." The Split will be reconstructed within the next few years. Interstate 670 connects Port Columbus International Airportmarker with I-270, I-71, and I-70.East of Columbus, I-70 passes through Zanesvillemarker and on to Cambridgemarker, where it intersects Interstate 77.Continuing on towards West Virginiamarker, I-70 intersects Interstate 470 just east of St. Clairsvillemarker.I-470 is primarily used for through traffic, and to avoid The Festival of Lightsmarker traffic during the holidays.In March 1995, a hole (from a former coal mine) opened up on the eastbound side of I-70 in Guernsey County near Old Washington, causing traffic to be rerouted onto US 40 between Old Washington and Cambridge for several months.

West Virginia

The portion of I-70 in West Virginia crosses the Ohio River at Wheelingmarker and runs through the Wheeling Tunnel.I-70 has only one through lane in each direction at the tunnel. A major interchange was planned but never completed on the east side of the Wheeling Tunnel. Upon merging with I-470, I-70 goes uphill towards Dallas Pike, West Virginia, This part of the road is called "Two Mile Hill", which is known locally for the many accidents at the bottom of the hill. I-70 has brought major development in Ohio Countymarker, the only county the route passes through in West Virginia, in the past few years.On the north side of the highway a former strip mine is being developed into a retail area called "The Highlands". This stretch of Interstate 70 is the shortest I-70 is in any state, traveling only from the Ohio River to the Pennsylvania border.

Pennsylvania

I-70 was initially envisioned to go through Pittsburgh, Pennsylvaniamarker; its planned route was later incorporated into I-376, as well as parts of I-76, I-279 and I-79.

I-70 also overlaps I-79 near Washington, Pennsylvaniamarker for .

The 38 miles (61 km) of I-70 between Washington, Pennsylvaniamarker and New Stanton, Pennsylvaniamarker is a sub-standard section of the highway.This section of I-70 used to be Pennsylvania Route 71. It is characterized by sharp curves, limited sight distance, narrow shoulders, and lack of merge lanes at interchanges. Traffic on clover leaf ramps must weave in the right through lane of traffic due to the lack of a third lane for entering and exiting traffic. Other on and off ramps effectively function as RIRO, making for a nervewracking entrance if traffic is approaching. The speed limit on this stretch is 55 mph (90 km/h)

From New Stanton to Breezewood, I-70 overlaps I-76and the Pennsylvania Turnpike. This is one of only two tolled sections of I-70 (the other being in Kansas, where the portion of the Kansas Turnpikeeast of Topeka is signed I-70).

Drivers on I-70 near Breezewood, Pennsylvaniamarker have to leave the freeway and travel a few blocks on US 30 past several traffic lights before returning to the freeway.This stretch of I-70 is one of the few gapson the Interstate Highway System.

Maryland

In Marylandmarker, Interstate 70 runs horizontally from the Pennsylvaniamarker state line near Hancockmarker east across the central portion of the state towards Baltimoremarker, following the route of the National Road, now known as U.S.40. It is the major east-west highway in the state, serving the cities of Hagerstownmarker and Frederickmarker and bypassing Ellicott Citymarker.East of Frederick, the route was originally designated Interstate 70N. The route serves Washington D.C.marker via Interstate 270, which was once designated Interstate 70S.Uniquely, Interstate 70 indirectly serves a branch of the Washington Metromarker at Shady Grovemarker via Interstate 370, which only connects to Interstate 270.

I-70 was planned to end at Interstate 95in Baltimore, but due to local opposition, it was only built to Maryland Route 122(see Historybelow). The pavement that was supposed to be part of the route to Baltimore is now a Park and ridein West Baltimore (City line at Exit 94).

History

Besides being the first Interstate signed into law, other oddities happened with I-70 as well:

Western terminus

As first proposed, the western terminus of I-70 was Denver, Coloradomarker.Utah and Colorado pressured the federal government to extend the plans for I-70 farther west, arguing that a direct link between Denver, Coloradomarker and Salt Lake City, Utahmarker was vital for an effective highway system.The proposal was to follow what is now U.S.Route 6 west and connect to I-15 at Spanish Fork, Utahmarker.Federal planners (influenced by the military) agreed to extend the proposed route of I-70, but not to serve Salt Lake. The military wanted to better connect southern California with the North Eastern U.S. This led to I-70's constructed route through the San Rafael Swell and terminating at Cove Fort. Many motorists include I-70 as part of their cross-country drives between New York Citymarker and Los Angelesmarker (which are accessible to I-70 via other interstates).

Eastern terminus

As a result of freeway revoltin the Baltimore area, Interstate 70 was not completed east of Maryland Route 122to its planned terminus on Interstate 95within the city of Baltimore, and for all intents and purposes, ends at a four-way symmetrical stack interchange with Interstate 695, the Baltimore Beltway.

Notoriety

The highway gave its name to the "I-70 Killer," a serial killerwho committed a string of murders within a few miles of it in several Midwestern states in the 1980s. No suspect has ever been apprehended despite the widespread publicity the murders have generated, including their being featured several times on the televisionshow America's Most Wantedand Unsolved Mysteries. However, Herb Baumeister, from Westfield, Indianamarker, is widely suspected as being the killer.Baumeister committed suicide after numerous human bones were discovered on his estate.

John Allen Muhammadand Lee Boyd Malvo, the duo responsible for the Beltway sniper attacks, were apprehended at a rest stop on I-70 near Myersville, Maryland, in 2002.

The 1985 World Serieswas a contest between the St. Louis Cardinalsand the Kansas City Royals, and won by the Royals. As these cities are primarily connected by Interstate 70, this World Series was often referred to as the "I-70 Series" in the media.

Major intersections



Auxiliary routes

I-70 has one of the closest distances between two distinct child interstates with the same child interstate number. I-470 near Topeka, Kansasmarker and I-470 on the east side of Kansas City, Missourimarker are approximately apart.This record is surpassed by I-395in Washington DC and I-395in Baltimore which are unrelated, but less than apart.

A breakdown of I-70's child routes follows:

References

  • Rob Hiaasen, "Go west, young man: Like Horace Greeley’s famed advice, curious sign on I-70 beckons yonder," Baltimore Sun, June 4, 2007, available at http://www.baltimoresun.com/entertainment/custom/today/bal-lifestyle-gowest,0,2235720.story


External links

Route of Interstate 70 overlaid on Google Maps

UT
232.15
373.83
CO
451.04
726.31
KS
424.15
683.01
MO
251.66
405.25
IL
155.94
234.90
IN
156.6
252.17
OH
225.6
363.29
WV
14.45
23.27
PA
167.92
270.40
MD
93.62
150.76
Total
2153.13
3465.13

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