South Carolina

[Mapmikey]

This short video shows a decent photo of the SC 6 bridge before the current one.  It was also flat.

It also shows a news article from when the other 2 bridges were built which notes the prior bridges were wooden but didn't say whether they were humped the same way...

https://www.wltx.com/article/news/history/built-by-slaves-railroad-line-in-st-matthews-could-get-on-national-register-of-historic-places-south-carolina/101-70faf7c0-f84f-4fca-a4ce-2b878d6388c7

An obscured view of the wooden bridge north of SC 6 is at the bottom of this document - http://nationalregister.sc.gov/SurveyReports/StMatthewsRRCut2.pdf

[Great Lakes Roads]

"At the South Carolina Transportation Forum in Columbia, transportation leaders, industry partners, and innovators from across the state are coming together to shape the future of our transportation system.

From addressing rapid population growth and rising costs to modernizing project delivery and streamlining processes, the conversations happening here reflect the work already underway at SCDOT and with our partners in the General Assembly.

Together, we are exploring new tools like permit reform and choice lanes, while strengthening collaboration to deliver projects more efficiently and prepare for the future of South Carolina."

[Plutonic Panda]

The I-95 Lake Marion Bridges are set to begin the reconstruction and widening this summer:

https://www.southcarolinapublicradio.org/sc-news/2026-04-06/construction-to-start-soon-on-400m-replacement-of-aging-i-95-bridges-over-lake-marion

[ElishaGOtis]

"At the South Carolina Transportation Forum in Columbia, transportation leaders, industry partners, and innovators from across the state are coming together to shape the future of our transportation system.

From addressing rapid population growth and rising costs to modernizing project delivery and streamlining processes, the conversations happening here reflect the work already underway at SCDOT and with our partners in the General Assembly.

Together, we are exploring new tools like permit reform and choice lanes, while strengthening collaboration to deliver projects more efficiently and prepare for the future of South Carolina."

Alright... time to change the MUTCD to give a choice between "Express Lane" and "Choice Lane" for Express Toll Lane wording on signs.

  

[Dirt Roads]

It also shows a news article from when the other 2 bridges were built which notes the prior bridges were wooden but didn't say whether they were humped the same way...

By the way, since all three bridges were replaced at roughly the same, it is more likely that the railroad (Southern Railway) embarked on an extensive "clearance improvement project" to raise clearances along the entire line (in this case, the former South Carolina Railroad branch from Branchville -to- Columbia. 

[Mapmikey]

It also shows a news article from when the other 2 bridges were built which notes the prior bridges were wooden but didn't say whether they were humped the same way...

By the way, since all three bridges were replaced at roughly the same, it is more likely that the railroad (Southern Railway) embarked on an extensive "clearance improvement project" to raise clearances along the entire line (in this case, the former South Carolina Railroad branch from Branchville -to- Columbia. 

Hard to say...the 4 bridges in the St Matthews area (those 3 plus US 176) were replaced 1953-72.  The next bridge south (St Matthews Rd) looks like it was redone not long before 1981, per historic aerials (the current 2001 bridge is on a widening/realignment of the road).  There are no other bridges down to Branchville and no other bridges on longtime roads the other direction to downtown Columbia.

[PColumbus73]

"At the South Carolina Transportation Forum in Columbia, transportation leaders, industry partners, and innovators from across the state are coming together to shape the future of our transportation system.

From addressing rapid population growth and rising costs to modernizing project delivery and streamlining processes, the conversations happening here reflect the work already underway at SCDOT and with our partners in the General Assembly.

Together, we are exploring new tools like permit reform and choice lanes, while strengthening collaboration to deliver projects more efficiently and prepare for the future of South Carolina."

Alright... time to change the MUTCD to give a choice between "Express Lane" and "Choice Lane" for Express Toll Lane wording on signs.

  

Where would they propose the toll lanes? In Charleston, they could see them on I-26 west of I-526, but between I-526 and US 17 / Ravenel Bridge I don't see them being able to widen I-26 much. The right-of-way iv very tight.

I'd also be curious how the state sells this to voters. South Carolina doesn't seem like a state where they would accept tolls easily.

[PColumbus73]

In Myrtle Beach, the Fred Nash Blvd extension to Harrelson Blvd near the airport and Coastal Grand Mall is open.

This is notable because the Fred Nash & Harrelson Blvd intersection features a 'hamburger' roundabout / intersection.

[D-Dey65]

Does anyone else think that there should be collective-distributor roads along Interstate 526 between I-26 and US 52-78?

[wriddle082]

Does anyone else think that there should be collective-distributor roads along Interstate 526 between I-26 and US 52-78?

Only if the mainline remains four lanes.  I wanna say the through traffic staying on 526 through this area would be lower than the traffic transitioning to/from 26 or 52/78.  The C/D lanes need to somehow be long enough to handle a large queue during rush hours to keep the mainline flowing, which might be tricky considering how close 26 is to 52/78.

[PColumbus73]

Maybe the I-26 and Rivers Ave exits could basketweave each other, but not actually a C/D road.

[chrisdiaz]

Maybe the I-26 and Rivers Ave exits could basketweave each other, but not actually a C/D road.

That's kind of what they're planning to do with the Lowcountry Corridor project preliminary plan

Other sections can be viewed here

[PColumbus73]

The Berlin G Myers Pkwy extension looks like is being numbered as SC 91. It doesn't appear to be updated on all of SCDOT's maps on their website, but Streetview has SC 91 signs shown. Has not been updated on Wikipedia either.

https://www.google.com/maps/@32.9816789,-80.2282803,3a,15y,99.31h,87.25t/data=!3m7!1e1!3m5!1sufCiuJWSpUi35MEpBKqisg!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fcb_client%3Dmaps_sv.tactile%26w%3D900%26h%3D600%26pitch%3D2.7489809877691584%26panoid%3DufCiuJWSpUi35MEpBKqisg%26yaw%3D99.3138504667737!7i16384!8i8192?entry=ttu&g_ep=EgoyMDI2MDQxOS4wIKXMDSoASAFQAw%3D%3D

https://en.wikipedia.org/wiki/List_of_state_highways_in_South_Carolina

https://scdot.maps.arcgis.com/apps/instant/gallery/index.html?appid=26e12dbfc9254d239a7e1e1f56908b95&sortField=modified&sortOrder=asc&view=grid

The SCDOT State Maintained Roads and Bridges GIS map has SC 91 as the route number for the parkway extension, updated January 7, 2026.

EDIT: It looks like all of Berlin G Myers Pkwy is now SC 91, I haven't found information about SC 165 being truncated.

[Mapmikey]

EDIT: It looks like all of Berlin G Myers Pkwy is now SC 91, I haven't found information about SC 165 being truncated.

What's the basis for this?  The GIS you link to still shows SC 165 on the eastern segment.

I found 1 map that shows SC 91 which does not suggest it will replace SC 165 - https://info2.scdot.org//GISMapping/GISMapdl/Dorchester%20County%20Functional%20Class%202020.signed.pdf

SC Highway Commission actions with the details are buried on their website, but I checked back to Dec 2024 and there is no item adding SC 91 to the system.

However, in January 2026 they truncated SC 124 east to Alice Ave (just east of US 25) and truncated SC 81 north to Valentine St, 1.8 miles north of US 25

[PColumbus73]

EDIT: It looks like all of Berlin G Myers Pkwy is now SC 91, I haven't found information about SC 165 being truncated.

What's the basis for this?  The GIS you link to still shows SC 165 on the eastern segment.

I found 1 map that shows SC 91 which does not suggest it will replace SC 165 - https://info2.scdot.org//GISMapping/GISMapdl/Dorchester%20County%20Functional%20Class%202020.signed.pdf

SC Highway Commission actions with the details are buried on their website, but I checked back to Dec 2024 and there is no item adding SC 91 to the system.

However, in January 2026 they truncated SC 124 east to Alice Ave (just east of US 25) and truncated SC 81 north to Valentine St, 1.8 miles north of US 25

https://www.reddit.com/r/summervillesc/comments/1l0383n/when_did_berlin_g_get_assigned_sc_91/

https://www.google.com/maps/@33.0343792,-80.160582,3a,15y,160.92h,89.49t/data=!3m7!1e1!3m5!1stgXIQFe0luKNl7IuRGj9uw!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fcb_client%3Dmaps_sv.tactile%26w%3D900%26h%3D600%26pitch%3D0.5107689260175761%26panoid%3DtgXIQFe0luKNl7IuRGj9uw%26yaw%3D160.9196416702854!7i16384!8i8192?entry=ttu&g_ep=EgoyMDI2MDQxOS4wIKXMDSoASAFQAw%3D%3D

Initially, it looked to me that only the extension was signed as SC 91, but then I saw this where SC 91 replaced the SC 165 shield at the northern end of the parkway.

[Mapmikey]

Thanks....

I guess SCDOT didn't want to assign US 17 ALT Bus and also still wanted a primary route to go through downtown Summerville...

[D-Dey65]

Maybe the I-26 and Rivers Ave exits could basketweave each other, but not actually a C/D road.

That's kind of what they're planning to do with the Lowcountry Corridor project preliminary plan

Other sections can be viewed here

That's actually pretty good. Especially when you have two interchanges on I-26 next to the airport that really have no business being so close.

[PColumbus73]

Thanks....

I guess SCDOT didn't want to assign US 17 ALT Bus and also still wanted a primary route to go through downtown Summerville...

Not sure why they wouldn't want to realign US 17 ALT off of Main Street.

[Mapmikey]

That's actually pretty good. Especially when you have two interchanges on I-26 next to the airport that really have no business being so close

If you're referring to Remount Rd and Aviation Ave interchanges, they were different before.

Aviation Ave was a full cloverleaf; Remount only had an off ramp from I-26 WB to Remount and an on ramp from Remount to I-26 EB.

Looking at the 1957 aerial, putting the cloverleaf at Remount would've required taking a lot of existing structures while there was essentially nothing where the Aviation interchange was placed.  Additionally, Aviation Ave was built to line up with the entrance to where the airport terminal used to be.

The reason they likely put the partial interchange at Remount is that the road leads to Hanahan, the SC Port Authority, plus there used to be a military post over there.  Building a new Remount alignment to meet US 52-78 at Aviation had no viable path either.

It used to be way worse.  The CD lanes through these two interchanges weren't built until ~2010, 20 years after the I-26/526 interchange opened.

[D-Dey65]

Yeesh! That looked dangerous even in the original configuration.

[architect77]

"At the South Carolina Transportation Forum in Columbia, transportation leaders, industry partners, and innovators from across the state are coming together to shape the future of our transportation system.

From addressing rapid population growth and rising costs to modernizing project delivery and streamlining processes, the conversations happening here reflect the work already underway at SCDOT and with our partners in the General Assembly.

Together, we are exploring new tools like permit reform and choice lanes, while strengthening collaboration to deliver projects more efficiently and prepare for the future of South Carolina."

Alright... time to change the MUTCD to give a choice between "Express Lane" and "Choice Lane" for Express Toll Lane wording on signs.

  

Where would they propose the toll lanes? In Charleston, they could see them on I-26 west of I-526, but between I-526 and US 17 / Ravenel Bridge I don't see them being able to widen I-26 much. The right-of-way iv very tight.

I'd also be curious how the state sells this to voters. South Carolina doesn't seem like a state where they would accept tolls easily.

Greenville has a tolled partial loop I-185.

[PColumbus73]

"At the South Carolina Transportation Forum in Columbia, transportation leaders, industry partners, and innovators from across the state are coming together to shape the future of our transportation system.

From addressing rapid population growth and rising costs to modernizing project delivery and streamlining processes, the conversations happening here reflect the work already underway at SCDOT and with our partners in the General Assembly.

Together, we are exploring new tools like permit reform and choice lanes, while strengthening collaboration to deliver projects more efficiently and prepare for the future of South Carolina."

Alright... time to change the MUTCD to give a choice between "Express Lane" and "Choice Lane" for Express Toll Lane wording on signs.

  

Where would they propose the toll lanes? In Charleston, they could see them on I-26 west of I-526, but between I-526 and US 17 / Ravenel Bridge I don't see them being able to widen I-26 much. The right-of-way iv very tight.

I'd also be curious how the state sells this to voters. South Carolina doesn't seem like a state where they would accept tolls easily.

Greenville has a tolled partial loop I-185.

Difference would be that I-185 (I believe) is funded with bonds, similar to US 278 / Cross Island Pkwy. I would anticipate that once the bonds for I-185 are paid off, that the tolls will be removed just like US 278. The tolled express lanes would likely be permanent or semi-permanent, which I think is where the state legislature might have an issue with.

[PColumbus73]

Managed to get some photos of the completed 'hamburger' intersection with Harrelson Blvd and Fred Nash Blvd / Coastal Grand Mall.

A couple observations:

The signage on the eastbound approach to the intersection (from US 17) is obscured by a curve and trees. There isn't enough time to get into the appropriate lane (assuming one wanted to change) after the curve. They may either need to cut them down or add an additional sign ahead of the curve to the effect of MALL DRIVE / FRED NASH BLVD / RIGHT LANE.

On the northbound off-ramp from US 17 to Harrelson Blvd, there are two new right turn FYA signals, but they aren't lined up very well with the driver's eye or how a car may be positioned for a right turn. Might be better to have a post-mounted signal in the median.

The positions of the signals for the turning movements at the 'hamburger', both turning off Harrelson Blvd and in the circle appear to be poorly positioned and don't seem to line up well with a car / driver's position. For the right turn off Harrelson Blvd and in the loop, I feel like a right-up / left-up RYG would be better at communicating the movement, especially in the loop.

I just noticed, on the westbound approach to the 'hamburger' (2nd photo from the top), the lane channelization markings make it appear there is a | thru | thru & right | right | configuration. There are no painted arrows in the left or right thru lanes.

I noticed drivers turning left onto Harrelson Blvd without going through the loop and turning right. I'm not sure if that is permitted or the intent of the design. It's not very clear with signs or signals either.

It seemed like people were a little confused with the free-flow right turn from Mall Drive to westbound Harrelson Blvd (to US 17), they seemed to kind of slow or stop mid-way through. There is also not a lot of space for merging before the interchange between Harrelson Blvd and US 17.

[NJRoadfan]

Hey look, SCDOT indirectly discovered what a jughandle is.

[Mapmikey]

Hey look, SCDOT indirectly discovered what a jughandle is.

They're partying like it's the early 1980s when this SC jughandle was first built...
https://maps.app.goo.gl/oLZmSTKmHn7bRxHo8