DUNCAN & SON LINES INC
Risk factors
Low riskVioCodes scoreA weighted read of the public FMCSA signals below — authority, insurance, out-of-service, crashes, roadside OOS rates, and carrier connections. A starting point for vetting, not a guarantee.
Broker payment signals
Bond, cancellation & authority risk for this broker — from free FMCSA records.
- No active broker bond on file — a bond is required to operate. High non-payment risk.
- Broker authority is inactive, not active.
These are FMCSA bond & authority signals — not a credit report. A filed bond cancellation is the biggest early warning that a broker may stop paying, but days-to-pay and slow-pay history aren’t public FMCSA data — verify those with a broker-credit service or references before extending terms.
Roadside inspection performance
Out-of-service rate vs national average. Lower is better.
CSA performance breakdown
FMCSA · Sep 2026420 inspections · 21 violations (4 OOS) · 10% of inspections had an OOS finding.
Violations by BASIC
click to filter codes
Top cited codes
score = count × severity weight
- 1393.75A3-TAOLVehicle Maintenance1 OOS
Tires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS
8
1× · sev 8
- 2393.45B2UVVehicle Maintenance
Brake Hose or Tubing Chafing and/or Kinking Under Vehicle
4
1× · sev 4
- 3393.45C-BSGVehicle Maintenance
Air Brake - Missing or inadequate Nonmetallic tubing spring guard
4
1× · sev 4
- 4393.53B-BVehicle Maintenance
Air Brake - CMV manufactured on or after 10/20/1994 has an automatic airbrake adjustment system that fails to compensate for wear
4
1× · sev 4
- 5395.24Hours-of-Service Compliance
HOS (ELD) - ELD Form and Manner
3
3× · sev 1
- 6393.203C-CBPVehicle Maintenance
Cab and Body Parts - Hood not securely fastened
2
1× · sev 2
- 7393.47E
Brake Out of Adjustment - Roto, Clamp (Short & Long), DD-3, or Bolt
1
1×
- 8392.2-SLLMFVehicle Maintenance
State/Local Laws - Wheel (mud) flaps missing or defective
1
1× · sev 1
- 9393.45D-BHTBS1 OOS
Air Brake - Hose/tubing with a bulge/swelling when air pressure is applied
1
1×
- 10392.2-SLLEWA2
State/Local Laws - Excessive weight - 2501-5000 lbs over on an axle/axle groups
1
1×
Most inspected in · top 8 states
- CA13
- AZ5
- TX3
- NM3
- AR2
- GA1
- CO1
- WA1
Latest FMCSA SMS snapshot. Codes link to the lookup — severity weighting, contest angles, and the DataQs Drafter for each. Click a BASIC to filter the codes.
Safety trends & next-run projection
Where each BASIC sits today, how it ranks against peers, and where it’s heading at the next monthly SMS run.
FMCSA keeps the Crash Indicator percentile private, and its measure needs a power-unit history public data doesn’t expose — so it can’t be estimated yet. VioCodes now records power units monthly, so a calibrated Crash estimate should light up over time. These are the public crash facts (all state-reportable crashes count, regardless of fault).
“Projected” estimates the next monthly SMS run from inspections on record now. FMCSA marks the BASIC percentile itself “Not Public,” so the percentile shown is a VioCodes estimate of how the carrier ranks against its peers, presented as a likely range (shaded on the gauge) and calibrated against real carriers. Crash Indicator has no public estimate — FMCSA keeps its measures fully private. Estimates, not official FMCSA figures. Not affiliated with FMCSA.
Recommendations
What’s driving each score, what to do about it, and where it could go.
Following / lane / reckless violations are the leading contributor to Hours-of-Service Compliance
High impactEstimated Hours-of-Service Compliance percentile of 68% is at/over the 60% intervention line. Carriers with a BASIC in alert are prioritized for enforcement (warning letters, audits) and inspected more often — which tends to generate still more violations.
- 395.3A1-HOSPDHOS (Property) - Driving more than 11 hours following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Time6× · 22%
- 395.3A2-HOSPDHOS (Property) - Driving beyond the 14 hour after coming on duty following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Tim4× · 11%
- 395.3A2-HOSPDITHOS (Property) - Driver driving beyond the 14 hour after coming on duty following 10 consecutive hours off duty at the time of inspection. Time1× · 5%
- 395.24D-ELDPTHOS (ELD) - On request by an authorized safety official, a driver must produce and transfer from an ELD the driver's hours of service records in accordance with t8× · 14%
- 395.24HOS (ELD) - ELD Form and Manner19× · 8%
- 395.24C2II-ELDTNHOS (ELD) - Driver failing to manually input or verify CMV trailer number.3× · 2%
- 395.8E-HOSPDHOS (Property) - No driver may make a false report in connection with a duty status. Explain3× · 13%
- 395.8E1PCHOS - False record of duty status driver improper use of Personal Conveyance - Not OOS3× · 11%
- 395.8A1-HOSPHOS (Property) - Failing to have a record of duty status using the method prescribed1× · 2%
- 395.3A2-PROPDriving beyond 14 hour duty period (Property carrying vehicle)1× · 4%
- Defensive-driving refresher on following distance and lane discipline
- Prioritize the out-of-service items — they carry the heaviest weight
A high share of violations are occurring in Riverside County, CA
Medium impact62 of 200 violations in the last 12 months (31%) came from inspections in Riverside County, CA. That can mean tougher enforcement there or simply more of your miles run through it — either way it's worth a look.
- Review the inspections from Riverside County, CA to spot recurring issues
- Brief drivers running that lane; consider rerouting around the toughest enforcement corridors where practical
Speeding violations are the leading contributor to Unsafe Driving
Low impactEstimated Unsafe Driving percentile of 14% is under the 60% line. In decent shape, but here's what's driving it.
- 392.2-SLLS2State/Local Laws - Speeding 6-10 miles per hour over the speed limit6× · 14%
- 392.2-SLLS4State/Local Laws - Speeding 15 or more miles per hour over the speed limit4× · 14%
- 392.2-SLLS3State/Local Laws - Speeding 11-14 miles per hour over the speed limit5× · 14%
- 392.2-SLLLRState/Local Laws - Lane restriction violation14× · 22%
- 392.2-SLLTCDState/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g., safety official, signal, sign, light, lane marking, other4× · 10%
- 392.2-SLLFCState/Local Laws - Following too closely1× · 4%
- 392.2-INATDriver- Inattentive or Distracted Driving1× · 4%
- 392.2CFailure to obey traffic control device1× · 3%
- 392.2-SLLUPState/Local Laws - Unlawfully parking /leaving vehicle on roadway2× · 1%
- Coach the drivers with speeding violations directly — Unsafe Driving points are weighted heavily
- Set and enforce a governed road speed; review telematics/dashcam speed events weekly
Controlled Substances/Alcohol needs attention
Low impactEstimated Controlled Substances/Alcohol percentile of 0% is under the 75% line. In decent shape, but here's what's driving it.
- Review recent inspections with violations in this BASIC and take remedial action with drivers/equipment
Brakes violations are the leading contributor to Vehicle Maintenance
Low impactEstimated Vehicle Maintenance percentile of 30% is under the 75% line. In decent shape, but here's what's driving it.
- 393.45D-BAir Brake - Audible air leak at a proper connection12× · 6%
- 393.45B2-B-AIRAir Brake - Hose/tubing damaged or not secured11× · 6%
- 393.55E-BAir Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 19987× · 4%
- 393.9A-LTSILighting - Turn signal - Any inoperative on the rearmost vehicle.3× · 4%
- 393.11A1-CSLRRConspicuity Systems - Truck tractor, lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1, 19978× · 3%
- 393.9A-LHLILighting - Headlamp(s) - Any inoperative3× · 2%
- 393.75A3-TAOLTires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS14× · 17%
- 393.75A1-TAOBETATires - All others, more than one ply is exposed in the sidewall and the area exceeds 2 square inches.1× · 2%
- 393.75C-TAOTD-LT1/32Tires - Less than 1/32 inch tread depth at 3 locations/2 adjacent tread grooves1× · 2%
- 393.207F-SASMDSuspension - Air spring/bag is missing or is detached at the top or bottom.1× · 2%
- 393.207A-SAPPASSuspension - Axle positioning part cracked/broken/loose/missing resulting in axle shift2× · 2%
- Check brake adjustment and listen for air leaks every pre-trip; put brakes on the PM schedule
- Fix air-loss and warning-light faults before dispatch — don’t “drive it in”
- Prioritize the out-of-service items — they carry the heaviest weight
Recommendations are generated from the carrier’s public FMCSA roadside-inspection record. Percentiles and projections are VioCodes estimates, not official FMCSA figures. Informational, not legal advice.
90-day safety improvement plan
What this carrier has struggled with most in the last 90 days — where to focus now.
- 393.75A3-TAOL×2Tires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS · OOS
- 393.45B2-BHTD×2Air Brake - Hose/tubing damage into the outer reinforcement ply. · OOS
- 393.45B2-B-AIR×2Air Brake - Hose/tubing damaged or not secured
- Gauge/thump every tire on the walk-around, including inner duals
- Replace before tread hits the limit and correct low pressure immediately
- 392.2-SLLEWA2×3State/Local Laws - Excessive weight - 2501-5000 lbs over on an axle/axle groups
- 392.2-SLLS1State/Local Laws - Speeding 1-5 miles per hour over the speed limit
- 393.45D-BHTBSAir Brake - Hose/tubing with a bulge/swelling when air pressure is applied · OOS
- Look under the truck for shifted axles and broken/leaking suspension parts
- Include suspension in scheduled maintenance
- 395.24×3HOS (ELD) - ELD Form and Manner
- 395.24D-ELDPT×2HOS (ELD) - On request by an authorized safety official, a driver must produce and transfer from an ELD the driver's hours of service records in accordance with t
- 395.30B2-ELDDFC24×2HOS (ELD) - Driver failing to certify the record immediately after the final required entry has been made or corrected for the 24 hour period.
- Log in and annotate the ELD correctly every day; fix edits promptly
- Plan trips around available hours — never falsify a log
Based on roadside inspections in the last 90 days, ranked by what recurs most. Informational, not legal advice.
Inspection & crash map
live · FMCSA MCMISEvery inspection and crash on record — hover a point for the summary, click for full detail (codes, severity, CSA points).
CSA points = violation severity weight × FMCSA time weight (3× in the last 6 months, 2× at 6–12, 1× at 12–24). Points are spread within each state — FMCSA records the inspection state, not an exact location. Source: FMCSA MCMIS.
Equipment
VINs via NHTSA108 distinct vehicles seen in this carrier’s roadside inspections.
+ 78 more.
Equipment is inferred from VINs recorded on roadside inspections (FMCSA MCMIS), decoded via the NHTSA vPIC API — it reflects vehicles inspected, not a current fleet roster.
Crash record (US, last 24 months)
Total
14
Tow-away
14
Injury
4
Fatal
0
Company profile
FMCSA censusAUTHORIZED FOR HIRE
- Interstate · 100+ mi211 drivers
- Interstate · <100 mi20 drivers
- Company officer
- DAVID DUNCAN
- Operation
- Interstate · Hazmat
- D-U-N-S
- 21652607
- Registered since
- 1974-06-01
- Last MCS-150 update
- 2026-02-10
- Census status
- Active
Fleet: 259 trucks · 259 leased/term tractors.
Source: FMCSA Company Census File (data.transportation.gov). Fleet and driver counts are self-reported on the carrier’s most recent MCS-150 filing.
Connections
carrier graphThis carrier shares VINs, addresses, phone numbers, officers or emails with 69 other carriers — review the connections below as part of your vetting.
Shared VINs come from FMCSA roadside-inspection records — a vehicle inspected under more than one carrier, often a fleet transfer or trailer interchange. Other links come from the FMCSA census. Shared identifiers are common and often legitimate — treat these as leads to investigate, not proof of wrongdoing.
Activity history
64 events- 02/10/2026MCS-150 update filed
23.8M mi reported (2025)
- 10/25/2021Insurance name changed — NATIONAL INTERSTATE INSURANCE COMPANY
BIPD/Primary · policy DUN 8199969-01
- 09/21/2021COMMON — INVOLUNTARY REVOCATION
DISCONTINUED REVOCATION (09/17/2021)
- 09/21/2021CONTRACT — INVOLUNTARY REVOCATION
DISCONTINUED REVOCATION (09/17/2021)
- 09/15/2021Insurance filed — NATIONAL INTERSTATE INSURANCE COMPANY
Liability (BIPD) — BMC-91X · policy DUN 8199969-01
- 09/15/2021Insurance replaced — NATIONAL INTERSTATE INSURANCE COMPANY
BIPD/Primary · policy DUN 8199969-01
- 12/31/2020Insurance replaced — NATIONAL INTERSTATE INSURANCE COMPANY
BIPD/Primary · policy VPP490005204
- 10/01/2018Insurance replaced — NATIONAL INTERSTATE INSURANCE COMPANY
BIPD/Primary · policy VEL 8100016-01
- 11/07/2015Insurance cancelled — NATIONAL INTERSTATE INSURANCE COMPANY
CARGO · policy VPP 4900052-00
- 10/01/2014Insurance replaced — NATIONAL INTERSTATE INSURANCE COMPANY
BIPD/Primary · policy VPP 4900052-00
- 05/16/2013Insurance cancelled — MERCHANTS BONDING COMPANY ( MUTUAL)
SURETY · policy AZ 169833
- 01/01/2011Insurance replaced — NATIONAL INTERSTATE INSURANCE COMPANY
BIPD/Primary · policy IML 0000014-00
- 01/01/2011Insurance replaced — MAX SPECIALTY INSURANCE COMPANY
CARGO · policy MAX5IM0001026
- 03/01/2008Insurance replaced — HARTFORD FIRE INSURANCE COMPANY
CARGO · policy 34 MS IQ2105
- 09/01/2006Insurance replaced — NATIONAL INTERSTATE INSURANCE COMPANY
BIPD/Primary · policy IML 0000014-00
- 09/01/2006Insurance cancelled — CANAL INSURANCE CO.
BIPD/Primary · policy 481914
- 08/12/2006Insurance cancelled — CANAL INSURANCE CO.
BIPD/Primary · policy 481914
- 08/07/2006COMMON — INVOLUNTARY REVOCATION
DISCONTINUED REVOCATION (09/05/2006)
- 08/07/2006CONTRACT — INVOLUNTARY REVOCATION
DISCONTINUED REVOCATION (09/05/2006)
- 07/17/2006COMMON — INVOLUNTARY REVOCATION
DISCONTINUED REVOCATION (07/18/2006)
- 07/17/2006CONTRACT — INVOLUNTARY REVOCATION
DISCONTINUED REVOCATION (07/18/2006)
- 07/17/2006Insurance replaced — CANAL INSURANCE CO.
BIPD/Primary · policy 481914
- 03/01/2006Insurance replaced — NATIONAL FARMERS UNION PROP. AND CAS. CO.
CARGO · policy 1SI0462966
- 09/08/2005MOTOR PROPERTY COMMON CARRIER — REINSTATED
- 09/08/2005MOTOR PROPERTY CONTRACT CARRIER — REINSTATED
- 09/01/2005Insurance cancelled — CANAL INSURANCE CO.
BIPD/Primary · policy 459611
- 03/16/2005MOTOR PROPERTY COMMON CARRIER — REINSTATED
REVOKED (09/07/2005)
- 03/01/2005Insurance cancelled — UNDERWRITERS AT LLOYDS LONDON
CARGO · policy R303841-11
- 12/16/2004Insurance cancelled — CANAL INSURANCE CO.
BIPD/Primary · policy 459611
- 11/15/2004Insurance replaced — CANAL INSURANCE CO.
BIPD/Primary · policy 459611
Merged from FMCSA authority, insurance, out-of-service, and census records.
Operations
Classification
- AUTHORIZED FOR HIRE
Area served
- Interstate
FMCSA safety rating
- Rating
- Satisfactory
- Type
- Non-ratable review
- Rated
- 2010-10-13
- Last review
- 2025-03-19
MCS-150 registration
- Form date
- 2026-02-10
- Reported mileage
- 23,801,483 mi (2025)
Got a violation you want to contest?
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