Interstate 15 Road Conditions & Traffic
Interstate 15 has 39 active incidents (5 critical). 1,433 miles from San Diego, CA → Sweet Grass, MT. Including 31 constructions, 7 accidents, 1 incident. Updated every 15 minutes.
Length
1,433 miles
Direction
North ↔ South
Route
San Diego, CA → Sweet Grass, MT
States
CA, NV, AZ, UT, ID, MT
39
Active Incidents
5
Critical
6
States
Active Incidents on Interstate 15 (39)
CONSTRUCTION
MT
Road Work
I-15
CONSTRUCTION
MT
Road Work
I-15
ACCIDENT
UT
accidentsAndIncidents
I-15
INCIDENT
MT
Incident
I-15
ACCIDENT
UT
accidentsAndIncidents
I-15
CONSTRUCTION
MT
Road Work
I-15
CONSTRUCTION
AZ
Roadway reduced to one lane on I-15 Northbound from MP 20 to MP 24 3/26/2026 7:20 AM to 3/26/2026 4:30 PM
I-15
CONSTRUCTION
AZ
Roadway reduced to one lane on I-15 Northbound from Virgin River (MP 17) to Virgin River (MP 21) 3/25/2026 9:27 AM to 3/25/2026 4:30 PM
I-15
CONSTRUCTION
AZ
Left lane closed on I-15 Northbound from MP 14 to MP 18 3/24/2026 6:34 AM to 3/24/2026 4:30 PM
I-15
CONSTRUCTION
AZ
Road maintenance operations on I-15 Northbound near MP 12 3/23/2026 12:44 PM to 3/23/2026 3:45 PM
I-15
CONSTRUCTION
ID
Minor Road construction on I-15 Northbound from SH-36 to SH-36. 3/30/2026 7:00 AM to 3/30/2026 6:00 PM Mon: Active all day Width Restriction: 13ft
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
CONSTRUCTION
ID
Long term road construction on I-15-BL from W Old Highway 91 to I-15 Northbound entrance ramp. All lanes closed. 5/26/2026 7:00 AM to 6/15/2026 9:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: Active all d
I-15-BL
CONSTRUCTION
ID
Long term road construction on ramp from I-15 Southbound to Inkom Business Loop. All lanes closed. 5/26/2026 7:00 AM to 6/15/2026 9:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: Active all day
I-15 Southbound
CONSTRUCTION
ID
Long term road construction on I-15 Both Directions from Inkom to Portneuf River. 3/2/2026 7:00 PM to 10/31/2026 7:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: Active all day Width Restriction: 12ft
I-15
CONSTRUCTION
ID
Long term road construction on I-15 Both Directions from MM (76.5) to MM (80.9). 12/3/2024 7:13 AM to 6/1/2027 6:00 PM Mon, Tue, Wed, Thu, Fri, Sat, Sun: Active all day Speed Restriction: 65mph Activ
I-15
CONSTRUCTION
ID
Minor Workers on roadway on I-15 Northbound from MM (172) to MM (181). Lanes Alternating. 3/25/2026 7:27 AM to 4/16/2026 5:00 PM Mon, Tue, Wed, Thu: 7:00 AM - 5:00 PM, Fri, Sat, Sun: Paused all day A
I-15
ACCIDENT
UT
accidentsAndIncidents
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
UT
roadwork
I-15
ACCIDENT
UT
accidentsAndIncidents
I-15
ACCIDENT
UT
accidentsAndIncidents
I-15
ACCIDENT
NV
accidentsAndIncidents
I-15
ACCIDENT
UT
accidentsAndIncidents
I-15
CONSTRUCTION
UT
roadwork
I-15
CONSTRUCTION
NV
roadwork
I-15
Last updated: Mar 30, 2026, 12:18 AM ET
Frequently Asked Questions: Interstate 15
What are the current road conditions on Interstate 15?
Interstate 15 currently has 39 active incidents, including 31 constructions, 7 accidents, 1 incident. View our interactive map for exact locations and details.
What states does Interstate 15 pass through?
Interstate 15 runs 1,433 miles from San Diego, CA → Sweet Grass, MT, passing through 6 states: CA, NV, AZ, UT, ID, MT.
How long is Interstate 15?
Interstate 15 is 1,433 miles long, running north to south from San Diego, CA → Sweet Grass, MT.
Interactive Interstate 15 Map
See all incidents, weather alerts, and traffic on Interstate 15 in real-time.
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