A-1 TRANSIT CORPORATION
Risk factors
Moderate 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.
Roadside inspection performance
Out-of-service rate vs national average. Lower is better.
CSA performance breakdown
FMCSA · Sep 2026126 inspections · 34 violations (5 OOS) · 17% of inspections had an OOS finding.
Violations by BASIC
click to filter codes
Top cited codes
score = count × severity weight
- 1393.75C-TAOTD-LT2/32Vehicle Maintenance
Tires - Less than 2/32 inch tread depth
16
2× · sev 8
- 2392.2-SLLS2Unsafe Driving
State/Local Laws - Speeding 6-10 miles per hour over the speed limit
12
3× · sev 4
- 3392.2-SLLLRUnsafe Driving
State/Local Laws - Lane restriction violation
3
1× · sev 3
- 4393.45D
Brake connections with leaks or constrictions
2
2×
- 5393.9A-LILVehicle Maintenance
Lighting - Identification lamp(s) inoperative
2
1× · sev 2
- 6392.2-SLLEWA1
State/Local Laws - Excessive weight - 1-2500 lbs over on an axle/axle groups
1
1×
- 7392.9A11 OOS
Failing to secure cargo as specified in 49 CFR 393.100 through 393.142
1
1×
- 8392.2-SLLSR
State/Local Laws - State registration/tag violation
1
1×
- 9392.9A2-CVehicle Maintenance1 OOS
Cargo - Vehicle components or dunnage not secured
1
1× · sev 1
- 10392.9A21 OOS
Failing to secure vehicle equipment
1
1×
Most inspected in · top 6 states
- WI14
- FL7
- IL3
- MO3
- IN2
- MN1
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.
Vehicle out-of-service rate exceeds the national average
High impactVehicle OOS rate is 24.7% vs the 22% national average. Carriers above the national OOS average draw more enforcement attention (audits, roadside stops) and can see higher insurance premiums.
- Review recent inspections with out-of-service violations and fix the root causes with equipment and drivers
- Run a preventative-maintenance program; periodically inspect tires, brakes and lights
- Reinforce thorough pre-trip and post-trip inspections; retrain where needed
A high share of violations are occurring in WI
Medium impact26 of 61 violations in the last 12 months (43%) came from inspections in WI. 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 WI 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 20% is under the 65% 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 limit10× · 45%
- 392.2-SLLS3State/Local Laws - Speeding 11-14 miles per hour over the speed limit5× · 17%
- 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
Driver Fitness needs attention
Low impactEstimated Driver Fitness percentile of 0% is under the 80% 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
Controlled Substances/Alcohol needs attention
Low impactEstimated Controlled Substances/Alcohol percentile of 0% is under the 80% 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
Tires violations are the leading contributor to Vehicle Maintenance
Low impactEstimated Vehicle Maintenance percentile of 52% is under the 80% line. In decent shape, but here's what's driving it.
- 393.75A3-TAOLTires - All others, leaking or inflation less than 50% of the maximum inflation pressure on tire not equipped with ATIS6× · 16%
- 393.75C-TAOTD-LT2/32Tires - Less than 2/32 inch tread depth2× · 9%
- 393.75A2-TAOTLMTires - All others, 75% of the tread width is loose/missing in excess of 12 inches of circumference1× · 6%
- 393.9A-LTSILighting - Turn signal - Any inoperative on the rearmost vehicle.2× · 5%
- 393.9A-LFTSILighting - Front - Turn signal - inoperative1× · 4%
- 393.9A-LHLILighting - Headlamp(s) - Any inoperative1× · 4%
- 393.100B-CCargo - Cargo not secured to prevent leaking/spilling/blowing/falling from CMV1× · 4%
- 393.124D-CCPConcrete Pipe - Improper arrangement of the load1× · 4%
- 392.9A2-CCargo - Vehicle components or dunnage not secured1× · 2%
- 393.45D-BAir Brake - Audible air leak at a proper connection3× · 4%
- 393.45C-BSGAir Brake - Missing or inadequate Nonmetallic tubing spring guard1× · 2%
- 393.55E-BAir Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 19982× · 2%
- Gauge and thump every tire on the walk-around, including inner duals
- Replace before tread hits the limit; correct low pressure immediately
- 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.
- 393.45D×2Brake connections with leaks or constrictions
- 393.95FEmergency Equipment - Stopped vehicle warning devices missing or improper
- 392.9A2Failing to secure vehicle equipment · OOS
- Check brake adjustment and listen for air leaks every pre-trip
- Fix air-loss and warning-light faults before dispatch; put brakes on the PM schedule
- 393.75C-TAOTD-LT2/32×2Tires - Less than 2/32 inch tread depth
- 396.17C-PIOperating a CMV without documentation of a periodic inspection
- 392.8-DDriver - Failed to inspect /use emergency equipment
- Gauge/thump every tire on the walk-around, including inner duals
- Replace before tread hits the limit and correct low pressure immediately
- 392.2-SLLS2×4State/Local Laws - Speeding 6-10 miles per hour over the speed limit
- 392.16-DDriver - Failed to use seat belt while operating a CMV
- 392.2-SLLLRState/Local Laws - Lane restriction violation
- Coach speed and following distance — Unsafe Driving points are weighted heavily
- Hands off the phone; always belt up
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 NHTSA97 distinct vehicles seen in this carrier’s roadside inspections.
+ 67 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
13
Injury
3
Fatal
0
Company profile
FMCSA censusAUTHORIZED FOR HIRE
- Interstate · 100+ mi30 drivers
- Interstate · <100 mi100 drivers
- Intrastate · 100+ mi65 drivers
- Intrastate · <100 mi46 drivers
- Company officer
- TIM SONNENTAG
- Operation
- Interstate · Hazmat
- Registered since
- 2001-03-28
- Last MCS-150 update
- 2025-05-02
- Census status
- Active
Fleet: 398 trucks · 266 owned tractors · 1,143 owned trailers.
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 7 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
8 events- 05/02/2025MCS-150 update filed
12.1M mi reported (2024)
- 05/19/2018Insurance cancelled — TRAVELERS PROPERTY CASUALTY CO. OF AMERICA
CARGO · policy QT-660-4346L050-TIL-07
- 01/12/2007Insurance cancelled — ZURICH AMERICAN INSURANCE COMPANY
BIPD/Primary · policy BAP929933500
- 12/18/2006CONTRACT — INVOLUNTARY REVOCATION
DISCONTINUED REVOCATION (01/04/2007)
- 10/01/2006Insurance filed — ZURICH AMERICAN INSURANCE COMPANY
Liability (BIPD) — BMC-91X · policy BAP8196362
- 10/01/2006Insurance replaced — ZURICH AMERICAN INSURANCE COMPANY
BIPD/Primary · policy BAP929933500
- 04/24/2001MOTOR PROPERTY CONTRACT CARRIER — GRANTED
- 03/28/2001Registered with FMCSA
AUTHORIZED FOR HIRE
Merged from FMCSA authority, insurance, out-of-service, and census records.
Operations
Classification
- AUTHORIZED FOR HIRE
Area served
- Interstate
FMCSA safety rating
- Rating
- Not rated
- Type
- —
- Rated
- —
- Last review
- —
MCS-150 registration
- Form date
- 2025-05-02
- Reported mileage
- 12,055,467 mi (2024)
Got a violation you want to contest?
Use the free AI-powered DataQs Drafter to generate a polished challenge letter — quotes the relevant 49 CFR, predicts your grant chance.