Reported enforcement areas
Interstate Speed Trap Database
81+ reported enforcement areas across major freight corridors. Search and filter by interstate or state. This is informational only — not a legal conclusion about any location.
81 reported enforcement areas
MM 205–215 (Tejon Pass)
Lebec / Kern County
Issue: Downgrade speed & brake-check enforcement
Steep grade with frequent CHP commercial enforcement.
Updated 2026-04-12
MM 257 area
Buttonwillow / Kern County
Issue: Commercial speed enforcement
Open straightaway, radar common near rest area.
Updated 2026-03-30
MM 1–10 (Siskiyou Summit)
Ashland / Jackson County
Issue: Grade & chain-law enforcement
Truck speed and brake checks in winter months.
Updated 2026-02-18
MM 116–119
DuPont / Pierce County
Issue: Speed & following-too-closely patrols
Congestion zone, aggressive lane-change enforcement.
Updated 2026-04-02
MM 135–140
Van Horn / Culberson County
Issue: Speed enforcement (75→reduced zones)
Known DPS commercial patrol corridor.
Updated 2026-04-20
MM 17–20
Quartzsite / La Paz County
Issue: Speed & commercial inspection
Inspection station and radar near town.
Updated 2026-03-15
MM 121–135 (Basin Bridge)
Henderson / St. Martin Parish
Issue: Reduced-speed bridge enforcement
60 mph bridge limit strictly enforced.
Updated 2026-04-08
MM 258–262
Madison County
Issue: Rural speed enforcement
Frequent FHP commercial stops.
Updated 2026-02-25
MM 118–122
Mesquite / Clark County
Issue: Speed enforcement near AZ line
Heavy patrol on Vegas–Utah freight run.
Updated 2026-04-18
MM 245–250
Baker / San Bernardino County
Issue: Desert speed enforcement
Long grades, radar near rest stops.
Updated 2026-03-22
MM 57–62
Cedar City / Iron County
Issue: Speed & port-of-entry checks
Inspection station with adjacent enforcement.
Updated 2026-04-05
MM 59–63
Dillon / Beaverhead County
Issue: Rural speed enforcement
Open road, intermittent patrol.
Updated 2026-01-30
MM 330–335
Cisco / Eastland County
Issue: Speed enforcement
DPS commercial patrols, reduced-speed transitions.
Updated 2026-03-28
MM 47–52
Minden / Webster Parish
Issue: Speed & lane-use enforcement
Left-lane restriction enforcement reported.
Updated 2026-02-11
MM 190–196
Augusta / Richmond County
Issue: Urban speed enforcement
Construction-zone speed reductions enforced.
Updated 2026-04-14
MM 161–163 (Monument Hill)
Monument / El Paso County
Issue: Downgrade & chain-law enforcement
Truck brake checks and grade speed patrol.
Updated 2026-03-09
MM 446–451 (Raton Pass)
Raton / Colfax County
Issue: Grade speed enforcement
Steep pass near CO line, port of entry nearby.
Updated 2026-02-20
MM 7–12
Cheyenne / Laramie County
Issue: Speed & wind-restriction enforcement
High-wind closures and speed patrol.
Updated 2026-04-01
MM 268–275
Hillsboro / Hill County
Issue: Speed enforcement & split junction
I-35E/W split, frequent DPS presence.
Updated 2026-04-10
MM 70–75
Pauls Valley / Garvin County
Issue: Speed enforcement
Reported OHP commercial patrols.
Updated 2026-03-05
MM 127–131
Emporia / Lyon County
Issue: Turnpike speed enforcement
Toll corridor with active patrol.
Updated 2026-02-28
MM 111–116
Ames / Story County
Issue: Speed & work-zone enforcement
Seasonal construction speed reductions.
Updated 2026-04-16
MM 48–53
Kingman / Mohave County
Issue: Grade & speed enforcement
Long grades west of town, radar common.
Updated 2026-03-12
MM 329–335
Tucumcari / Quay County
Issue: Speed enforcement
Reduced-speed town transition.
Updated 2026-02-22
MM 72–76
Amarillo / Potter County
Issue: Urban speed enforcement
Frequent commercial stops near interchange.
Updated 2026-04-09
MM 277–280
West Memphis / Crittenden County
Issue: Inspection & speed enforcement
Major inspection station and patrol zone.
Updated 2026-04-21
MM 79–85
Jackson / Madison County
Issue: Speed & following-distance enforcement
THP commercial enforcement reported.
Updated 2026-03-18
MM 64–73 (Black Mountain)
Black Mountain / Buncombe County
Issue: Steep downgrade enforcement
Runaway-truck grade, strict speed patrol.
Updated 2026-04-03
MM 123–130
Lebanon / Laclede County
Issue: Speed enforcement
Reported MSHP commercial patrols.
Updated 2026-03-01
MM 283–289
Vinita / Craig County
Issue: Turnpike speed enforcement
Will Rogers Turnpike patrol.
Updated 2026-02-14
MM 123–129
Lincoln / Logan County
Issue: Speed & lane enforcement
ISP commercial patrols reported.
Updated 2026-03-26
MM 204–210
Grenada / Grenada County
Issue: Speed enforcement
Reduced-speed transitions near town.
Updated 2026-02-09
MM 66–70
Sikeston / Scott County
Issue: Speed & junction enforcement
I-55/I-57 split traffic enforcement.
Updated 2026-04-11
MM 168–175
Lafayette / Tippecanoe County
Issue: Work-zone & speed enforcement
Recurring construction zones.
Updated 2026-04-07
MM 91–94
Elizabethtown / Hardin County
Issue: Speed enforcement
KSP commercial patrols reported.
Updated 2026-03-20
MM 304–310
Cullman / Cullman County
Issue: Speed enforcement
Rolling-hill radar zones.
Updated 2026-02-16
MM 205–218 (Eisenhower Tunnel)
Silverthorne / Summit County
Issue: Grade, chain-law & speed enforcement
Mandatory chain/traction laws, steep grades.
Updated 2026-04-19
MM 157–161
Hays / Ellis County
Issue: Speed enforcement
Open-road radar patrols.
Updated 2026-03-03
MM 124–130
Columbia / Boone County
Issue: Speed & work-zone enforcement
Active reconstruction corridor.
Updated 2026-04-13
MM 152–157
Zanesville / Muskingum County
Issue: Speed enforcement
Hilly terrain, OSHP patrols.
Updated 2026-02-27
MM 32–51 (Alligator Alley)
Naples / Collier County
Issue: Strict speed enforcement
70 mph limit, heavy FHP presence, fencing zone.
Updated 2026-04-22
MM 11–18
Valdosta / Lowndes County
Issue: Speed enforcement near FL line
Frequent commercial stops southbound.
Updated 2026-03-29
MM 144–160 (Jellico Mtn)
Jellico / Campbell County
Issue: Steep grade enforcement
Runaway grades near KY line.
Updated 2026-04-04
MM 157–164
Findlay / Hancock County
Issue: Speed & lane enforcement
OSHP commercial patrols.
Updated 2026-02-19
MM 173–178
Winnemucca / Humboldt County
Issue: Speed enforcement
Reduced-speed town transition on long corridor.
Updated 2026-03-24
MM 323–345 (Elk Mountain)
Elk Mountain / Carbon County
Issue: Wind, ice & speed enforcement
Frequent closures and variable speed limits.
Updated 2026-04-17
MM 122–126
Ogallala / Keith County
Issue: Speed enforcement
NSP commercial patrols reported.
Updated 2026-03-07
MM 120–126
Des Moines / Polk County
Issue: Urban speed & lane enforcement
Congested metro segment.
Updated 2026-02-23
MM 145–161
Snow Shoe / Centre County
Issue: Grade & speed enforcement
Long mountain grades, brake checks.
Updated 2026-04-06
MM 70–77
Wytheville / Wythe County
Issue: Speed & following-distance enforcement
Heavy-truck corridor, VSP patrols.
Updated 2026-04-15
MM 65–72
Harrisburg / Dauphin County
Issue: Speed & work-zone enforcement
Dense freight traffic and construction.
Updated 2026-03-11
MM 69–74
Bristol / Sullivan County
Issue: Speed enforcement near VA line
THP commercial patrols.
Updated 2026-02-13
MM 305–319 (Bozeman Pass)
Bozeman / Gallatin County
Issue: Grade & winter speed enforcement
Steep pass, chain-up areas.
Updated 2026-03-17
MM 260–265
Chamberlain / Brule County
Issue: Speed enforcement
River-valley grade, radar reported.
Updated 2026-02-08
MM 154–159
Albert Lea / Freeborn County
Issue: Speed & junction enforcement
I-90/I-35 junction patrols.
Updated 2026-03-31
MM 280–284 (Thruway)
Syracuse / Onondaga County
Issue: Toll-corridor speed enforcement
NYSP commercial patrols.
Updated 2026-04-02
MM 94–102
Savannah / Chatham County
Issue: Speed enforcement
Heavy port-traffic corridor.
Updated 2026-04-20
MM 160–170
Florence / Florence County
Issue: Speed & following-distance enforcement
SCHP commercial patrols, known corridor.
Updated 2026-03-23
MM 17–25
Lumberton / Robeson County
Issue: Speed enforcement
Frequent stops near SC line.
Updated 2026-02-26
MM 11–18
Emporia / Greensville County
Issue: Strict speed enforcement
Well-known reduced-speed enforcement zone.
Updated 2026-04-18
MM 47–53
Baltimore / Baltimore County
Issue: Urban speed & lane enforcement
Tunnel approaches, HazMat routing rules.
Updated 2026-03-14
MM 14–20
Norwalk / Fairfield County
Issue: Congestion & following-distance enforcement
Dense corridor, aggressive enforcement.
Updated 2026-02-10
MM 35–45
Charlotte / Mecklenburg County
Issue: Urban speed & lane enforcement
Heavy freight metro segment.
Updated 2026-03-27
MM 173–178
Lavonia / Franklin County
Issue: Speed enforcement near SC line
Reported commercial patrols.
Updated 2026-02-17
MM 211–216
Glendive / Dawson County
Issue: Speed enforcement
Open corridor, intermittent patrol.
Updated 2026-01-28
MM 41–46
Tomah / Monroe County
Issue: Speed & junction enforcement
I-90/94 junction patrols.
Updated 2026-03-08
MM 74–80
Kalamazoo / Kalamazoo County
Issue: Speed & work-zone enforcement
Recurring construction zones.
Updated 2026-04-01
MM 134–140 (Monteagle)
Monteagle / Marion County
Issue: Steep grade enforcement
Notorious 6% grade, strict truck speed.
Updated 2026-04-12
MM 242–252
Black Canyon City / Yavapai County
Issue: Grade & speed enforcement
Long climb out of Phoenix basin.
Updated 2026-03-19
MM 53–59 (Saluda Grade)
Saluda / Polk County
Issue: Steep downgrade enforcement
Steepest mainline grade in the East.
Updated 2026-02-21
MM 28–40 (Flat Top Mtn)
Ghent / Raleigh County
Issue: Grade & turnpike speed enforcement
Toll corridor with steep grades.
Updated 2026-03-25
MM 22–34
Frostburg / Allegany County
Issue: Steep grade enforcement
Big Savage Mountain runaway grades.
Updated 2026-02-12
MM 216–228 (Cabbage Hill)
Pendleton / Umatilla County
Issue: Steep grade & speed enforcement
Deadman Pass descent, brake checks.
Updated 2026-04-09
MM 7–15
Burley / Cassia County
Issue: Speed enforcement
Open corridor radar patrols.
Updated 2026-03-04
MM 52–62 (Snoqualmie Pass)
Snoqualmie Pass / Kittitas County
Issue: Chain-law & speed enforcement
Mountain pass, traction laws enforced.
Updated 2026-04-16
MM 9–22 (Virgin River Gorge)
Littlefield / Mohave County
Issue: Canyon grade & speed enforcement
Narrow canyon, no shoulders, strict speed.
Updated 2026-04-23
MM 518–524
Sacramento / Sacramento County
Issue: Urban lane & speed enforcement
Truck-route and lane-restriction enforcement.
Updated 2026-03-13
MM 18–24
El Paso / El Paso County
Issue: Urban speed & inspection
Border-corridor commercial enforcement.
Updated 2026-02-24
MM 100–115
Green River / Emery County
Issue: Remote speed enforcement
Longest services gap in the system; radar reported.
Updated 2026-03-10
MM 125–130
Oklahoma City / Oklahoma County
Issue: Urban speed & lane enforcement
Crosstown freight corridor patrols.
Updated 2026-04-05
MM 174–185 (Donner Summit)
Truckee / Nevada County
Issue: Chain-law & grade speed enforcement
Mandatory chain controls in winter.
Updated 2026-04-21
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Get CDL defense helpImportant: Entries describe areas where commercial traffic enforcement has been reported along known freight corridors. They are provided for general awareness and safety, are not verified in real time, and are not legal conclusions, accusations, or advice about any agency or location. Always follow posted limits and lawful instructions.
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