I’ve written extensively about the National Road, especially in Indiana and Illinois. See everything I’ve written here. As I work to deprecate my old Roads site, I need to bring a few articles about the road in Illinois here. Here’s the first of them, about the many changes at the Indiana/Illinois state line. I’ve updated and expanded it. This is based on recent research and a bunch of visits: one in 2006, two in 2007, one in 2009, and one in 2014.

The National Road and US 40 have changed dramatically at the Indiana-Illinois state line thanks to repeated improvements in this corridor. I’m going to try to explain the changes and show the various alignments. It gets confusing, so strap in.

The Indiana Historical Aerial Photo Index (IHAPI) at the Indiana Geological Survey shows these roads’ progression. Click any of these maps to make them larger. This first image is from 1946, showing the original two-lane US 40 running from upper right in Indiana to lower left in Illinois. The thick white line at about the ¼ mark from the left is the state line.

Indiana Historical Aerial Photo Index image

In about 1949, in Indiana the road was moved slightly north and improved to four divided lanes. On the Illinois side, sometime during the 1950s the original road was abandoned and a new two-lane alignment built immediately to the north. This 1958 aerial images shows it all. In the bottom left corner of this image, you can see a trace of the original National Road alignment just below the new US 40.

Indiana Historical Aerial Photo Index image

I-70 was built here in the mid-late 1960s. About a mile and half of it on either side of the state line was built directly onto the US 40/National Road alignment. This 1966 aerial image shows I-70 under construction. When I-70 was finished, US 40 was routed onto it for about three miles. Also under construction here is a two-lane road that connects US 40 in Indiana to what would shortly become old US 40 in Illinois.

Indiana Historical Aerial Photo Index image

Finally, this is what the scene looks like today. Click this map to make it larger. I’ve widened the view a bit to show the interplay between US 40 and I-70, placing the state line near the middle. In 2011, US 40 was rerouted onto I-70 to bypass Terre Haute, placing the 1949 alignment of US 40 here under county maintenance. Notice especially Illiana Drive, which branches off W. National Dr. in Indiana and flows into the old alignment of US 40 in Illinois.

Bing Maps, 2021

From a road trip I made in 2009, here’s what the original National Road/US 40 alignment looks like in Indiana. This is a westbound photo. This bridge over Clear Creek was built in 1919.

Old US 40 near Toad Hop

Shortly past that bridge is the last opportunity to turn off the original alignment before it ends. This is the last 200 feet of the original National Road in Indiana. The 1949 alignment of US 40 is about 200 feet to the north (right) of here, and I-70 is about 200 feet to the south (left). The turnoff is immediately to the right of where I stood to make this photo, and it connects right to Illiana Drive. If you squint, you can see it on the map above.

Old US 40 near Toad Hop

If you make that turn and cross the 1949 alignment of US 40, Illiana Drive curves hard to the left and heads toward Illinois. While this road was never the National Road or US 40, the Indiana National Road Historic Byway was routed along it by necessity. You can see a National Road guide sign just beyond the speed limit sign in this 2006 photo.

Toward Illinois on old US 40

Shortly you come upon the Illinois state line. On my 2006 visit, I drove into Illinois a little bit and found US 40 shields on this section of road, even though US 40 was officially routed onto I-70. On this visit in 2007, the US 40 shields were gone. I’ve heard, but can’t confirm, that Illinois maintains this road and counts it as part of US 40. Beyond this curve, Illiana Drive flows into the 1950s alignment of US 40.

Into Illinois

This was the day of the annual Ride Across Indiana (RAIN), a bicycle tour across Indiana that follows US 40 all the way. This was the starting line, just inside Illinois. That’s my friend Dawn standing near my car; she’s been a frequent road-trip companion for many years.


Shortly after you curve onto the 1950s alignment of US 40, you can see the original alignment standing abandoned alongside. In this aerial image, two roads are marked E US Highway 40. The lower segment is the original National Road alignment.

Bing Maps 2021

This eastbound view shows the road as it emerges from the woods. 2014 photo.

Abandoned brick road

If you walk into those woods, the old roadbed is largely still there. The bricks are just an inch or so into the soil, and you can easily reach them by clearing soil away with your foot. 2007 photo.

Abandoned National Road

As you emerge from the woods you see that the road had a noticeable grade. That’s my car at the top. 2007 photo.

Abandoned National Road

On one of my 2007 visits, turning my car around there I accidentally backed it off the access road and got it stuck. A woman who lived nearby came out to help, as did a passing motorist. My friend Dawn was with me too. We ended up lifting the front end of the car and pushing it back into the ditch, right onto the brick National Road. It must have been 50 years since anyone had driven on those bricks! I backed my car up to get a good running start and then made a break for it up the hill. The bottom of my car scraped the lip at the top of the hill as it went over, but no fluids or parts trailed behind me so I hoped all was well.

Abandoned National Road

The woman asked why we were out on that hot morning. When we pointed excitedly and said, “We’re driving the National Road all the way to Vandalia!” she said, “Oh, that.” I suppose if the National Road runs through your front yard, you take it for granted. She did mention that the neighbor from whom she and her husband bought their property had helped build the brick road, watched US 40 go in ten yards to the north, and lived long enough to watch I-70 start to be built on what used to be some of his land. The neighbor told her that when US 40 was built, all the bridges and culverts along the National Road were torn out. That meant no long drives on the brick.

Incredibly, some years ago I found a set of photographs showing this road being built, in about 1925! Here’s one; you can see more in this article. Notice that this road is a shallow U-shaped concrete pad with a layer of sand laid in, and then the bricks laid on.

Building the Illinois National Road

This diagram from a 1923 report of the Illinois Department of Highways shows this construction. I wonder why Illinois bothered with the bricks; why not just pour a concrete slab and be done with it? But these were experimental days in highway construction, and highway engineers were figuring out what worked best. It didn’t take long for road-builders to give up on brick. I’d say that after about 1925, nobody was building brick highways anymore.

Looking west from Dunlap Road, you get a better sense of the brick road (despite the equipment stored on it). 2007 photo.

Abandoned National Road

This road is in poor condition here. I brought my friend Michael along to see it on the second 2007 visit and we walked this segment until it ended, near where I-70 intersects. Here he is standing on it, in a place where most of the bricks have been removed to reveal the concrete pad below.

Abandoned National Road

On the 2007 trip with Michael, we found an intact bridge on the old road. It would probably be more accurately characterized as a box culvert. I’m pretty sure this culvert spans Hawks Creek. Unfortunately, I’m not 100% sure thanks to my poor note-taking. But given where these photos fall in order the day I made them, if I’m off, it’s not by far. This eastbound photo shows the road, bricks removed, ending abruptly.

Abandoned National Road

The place where the road used to be continues, rather obviously.

Abandoned National Road

Here’s the culvert. It’s an odd affair: the culvert is topped with earth, which is topped with a concrete slab.

Abandoned National Road culvert

This is a sizeable culvert. Here you can see my friend Michael having a closer look at it.

Abandoned National Road culvert

At the I-70 intersection, US 40 exits I-70 and follows the 1950s alignment. But large sections of this brick road continue to appear all the way to Marshall, about 5½ miles away, and then from the other side of Marshall about another 5½ miles, almost to Martinsville.

Related reading:

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10 responses to “The National Road and US 40 at the Indiana/Illinois line”

  1. shirley B. Avatar
    shirley B.

    Thanks for sharing this very interesting post. You made me travel through time (and space). These days it’s wonderful to see your part of the world this way, especially knowing we’re bound to stay home for the foreseeable future

    1. Jim Grey Avatar

      I’m happy you appreciate it!

  2. brandib1977 Avatar

    You’re lucky you had help getting your car out but the experience did give you a chance to meet the lady with the great stories.

    I want to live with the National Road in my front yard!

    1. Jim Grey Avatar

      I wish I were less reticent, because every time I do meet someone I end up learning so much!

      1. brandib1977 Avatar

        The best part of any adventure are the people you meet along the way. So it used to be, anyway. Sigh.

  3. Anne C Peden Avatar
    Anne C Peden

    Enjoyed this article!

    1. Jim Grey Avatar

      I’m happy you did!

  4. Dave Powell Avatar
    Dave Powell

    One of my late uncles drove big rigs when Route 40 was the straightest run between Ohio and Massachusetts. He charmed his little nieces and nephews with stories of the huge caves and “magnetic mountains” he visited along the way.

    Now, whenever I run up to the Route-40 Ace Hardware here in Westford, Mass., I think of how often Uncle Clarence passed this way.

    1. Jim Grey Avatar

      40 in eastern Ohio is wonderful. If you ever get to drive it, do.

  5. Dave Powell Avatar
    Dave Powell

    Indeed it is! We drove 40 many times to visit mom, dad and my younger brother while they were still alive. We were avid “shunpikers” then and the route was a beautiful ride… until a big rig bore down on one’s tail!

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