Projects

Traffic Impacts

For the week of Jan. 26

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Thank you for driving safely through the 18-mile I-25 South Gap project. The barrier and narrower lanes allow us to maintain two lanes in each direction during peak travel times but require extra attention from motorists when traveling through the project corridor. 

Remember - the speed limit is 60 mph throughout the entire construction zone. CDOT has funded increased enforcement, which is occurring both on the ground and by aircraft. On the frontage roads, the speed limit is 45 mph. In inclement weather, or for incidents, the speed limit may be reduced, so please pay attention to speed limit signs throughout the corridor as they will fluctuate. Don’t forget that fines are doubled in work zones. 

Read below to learn about anticipated traffic impacts on the project. Note, crews may require emergency mobile operations during daytime hours to refresh striping and fix potholes along the corridor. Check Cotrip.org for current travel times.

Remember: all construction schedules are weather-dependent and could change.


12-hour lane closure needed for pothole repair
On Friday night, Jan. 24, from 7 p.m. to 7 a.m., crews will perform emergency pothole repair along northbound I-25 approaching Spruce Mountain Road.

Crews will use concrete to permanently fix this pothole. The concrete will need time to set, requiring a 12-hour lane closure from Upper Lake Gulch Road to just passed Spruce Mountain Road.

One lane will remain open. Please stay the course of I-25, but expect some delays. Check cotrip.org for estimated travel times.

Potholes are caused by the expansion and contraction of ground water under the pavement. When the water freezes, it fills more space under the pavement, which then expands, bends and cracks, weakening the road surface. When the ice melts, the pavement contracts, leaving gaps or voids underneath the surface. This continuous “freeze – thaw” cycle weakens the pavement and allows it to continue cracking. As the weight of vehicles pass over the weakened pavement, it causes it to break and creates a pothole.

West Frontage Road Block 2a and 2 Closures

Drivers who use the West Frontage Road should continue to watch for block closures next week as crews continue major drainage work. 

Timeframes:

  • At 12:01 a.m. on Tuesday, Jan. 28, through late Sunday, Feb. 2 (Block 2a)
  • At 12:01 a.m. on Monday, Feb. 3, through late Friday, Feb. 7 (Block 2)

Location: West Frontage Road north of Tomah Road for 1.75 miles (see blocks 2a and 2 on the map below).

 Kraemer South Gap Detour Map Frontage Road Closures

Detours: To access any area north of the closure, use the West Frontage Road south from Plum Creek Parkway. To access any area south of the closure, including residential access on Tomah Road, exit I-25 at the Sky View Lane/Tomah Road interchange and use the open portion of the West Frontage Road north. Access to residents living on Tomah Road will be maintained.

Following the closures, drivers will see a temporary traffic signal north of Tomah Road to facilitate one-way traffic. This signal reduces the need for daytime and nighttime flaggers. The speed limit will be reduced to 35 mph approaching the signal. For your safety, please obey this traffic signal and posted speed limits.

Construction Work: Installation of new drainage pipes under I-25 under the West Frontage Road.

Drivers: I-25 drivers – please stay the course of I-25. Local traffic – detour routes will be heavily signed for your convenience. Access to local driveways and businesses will be maintained.

This is the fifth and sixth in a series of closures that will allow crews to safely complete drainage work.

This work is weather-dependent and subject to change.

Additional Frontage Road Block Closures Coming Soon - See Frontage Road Map Above

Following the above closure, residents living along the I-25 East and West Frontage Roads can expect intermittent block closures throughout January and February. The schedule for the next frontage road closures are weather-dependent and subject to change.

Frontage Road Block Closure limits Tentative Dates
West Frontage Road 3 Sky View Lane to Tomah Road Jan. 20 - 27
West Frontage Road 2A North of Tomah Road for 1.5 miles Jan. 28 - Feb. 2
West Frontage Road 2 Between Tomah Road and Territorial Road Feb. 2 - 7
East Frontage Road 5 Between Creekside Bible Church and Bell Mountain Parkway Feb. 7 - 16
East Frontage Road 6 Between Bell Mountain Parkway and the Castle Rock Quarry Feb. 16 - 25
East Frontage Road 7 Between the Castle Rock Quarry and Columbine Open Space Feb. 25 - March 1
East Frontage Road 8 - Part 2 Between Columbine Open Space and Sky View Lane March 1 - March 9


Additional block closures may be scheduled after these are completed.

For more information regarding each frontage road closure, please visit the I-25 South Gap Frontage Road webpage. For detailed dates, stay tuned to these emails and our Facebook page, @I25SouthGapProject. 


Closures

* Remember: planned lane closures can be affected by weather. 

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Description Time Frame Work Detour

Single lane closures northbound and southbound I-25
between Plum Creek Parkway and Sky View Lane 

Sunday-Friday
Jan. 26-31
8 p.m. to 5 a.m.

Guardrail and pothole repair, guardrail removal,
grading, glare screen installation, traffic shifts, striping, pavement work, fiber testing, 
sign placement

One lane open in each direction of I-25.
Stay the course!

Single lane closures along northbound and southbound I-25 on 
the southern section of the project, between Greenland and 
Monument

Sunday-Friday
Jan. 26-31
8 p.m. to 5 a.m.

Barrier work, sign placement, fiber testing
traffic shifts, pothole repair, guardrail removal, 
grading, glare screen installation and paving.. 

One lane open in each direction of I-25. 
Stay the course!

Single lane closures along northbound and southbound I-25 between
Sky View Lane (Tomah Road) and Greenland Road

Sunday-Friday
Jan. 26-31
8 p.m. to 5 a.m.

Pavement work, barrier placement, paving operations, pothole repair and traffic shifts

One lane open in each direction of I-25. 
Stay the course!

Single lane closure of northbound I-25 between Upper Lake Gulch Road and Spruce Mountain Road

Friday
Jan. 24
7 p.m. to 7 a.m.

Pothole repair

One lane open in each direction of I-25. 
Stay the course!

Full closure of the Spruce Mountain Road on-ramp to northbound I-25

Ongoing for 9 months  
(Began Oct. 6).

Bridge demo and rebuild.

To access northbound I-25 from Larkspur, motorists should use the Upper Lake Gulch Road on-ramp to northbound I-25.

To access Larkspur from southbound I-25, motorists should use the southbound I-25 off-ramp to Spruce Mountain Road.

Full closure of the southbound I-25 off-ramp to Upper Lake Gulch Road.

Ongoing for 9 months  
(Began Oct. 25)

Bridge demo and rebuild.

 

To access northbound I-25 from Larkspur, motorists should use the Upper Lake Gulch Road on-ramp to northbound I-25.

To access Larkspur from southbound I-25, motorists should use the southbound I-25 off-ramp to Spruce Mountain Road.

Shoulder closures along northbound and southbound I-25 throughout the 18-mile project corridor.  

Monday-Friday
Jan. 24-31
8:30 a.m. to 4 p.m.

Earthwork and erosion control

One lane open in each direction of I-25. 
Stay the course!

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Description Time Frame Work Detour
Closure of a portion of the West Frontage Road north of Tomah Road (Block 2a & 2 on frontage road map)

2a: Tuesday-Sunday
Jan. 28 at midnight through Feb. 2 

2: Monday-Friday

Feb. 3 at midnight through late Feb. 7

drainage installation

To access areas north of the closure, including Crystal Valley Parkway, use the East Frontage Road from the Plum Creek Parkway exit. To access areas south of the closure, including Bell Mountain Ranch, use the East Frontage Road from the Tomah Road exit. 

Single lane closures and flagging operations
along East and West Frontage Roads 
Plum Creek Parkway and Sky View Lane (Tomah Road)

Daytime Hours

Monday-Friday
Jan. 27-31
8:30 a.m. to 4 p.m.

Installation of fiber optic lines,
frontage road repairs and install
guardrail
Watch for flaggers who will direct traffic.
Residential access will be maintained. 
Thank you for your patience!
Flaggers will be present at the Greenland Road access to I-25

Monday-Saturday
Jan. 27-Feb. 1
8:30 a.m. to 4 p.m.

Bridge work Watch for flaggers who will direct traffic.
Residential access will be maintained. 

Project Offices in Castle Rock

A temporary construction office for CDOT and its contractor partner, Kraemer North America, is located near the intersection of Crystal Valley Parkway and the I-25 east Frontage Road. Please watch for vehicles entering and exiting the site throughout the duration of construction. Upon project completion, the area will be returned to its previous state; the asphalt will be removed and the area will be re-graded and seeded.


Safety for drivers and workers is our top priority during construction.

 Get project text alerts:
Text I25GAP to 21000.

 Get project emails:

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