Safety Measurement System - Complete SMS Profile (U.S. DOT# 106905)

TROMBLY MOTOR COACH SERVICE INC

U.S. DOT#: 106905

Address: 16 COMMERCIAL DRIVE
DRACUT, MA 01826
Number of Vehicles: 147
Number of Drivers: 185
Number of Inspections: 24

Safety Rating & OOS Rates

(As of 01/15/2026 updated daily from SAFER )

SATISFACTORY

(Rating Date: 09/08/2025)

Out of Service Rates

Type	OOS %	National Avg %
Vehicle	4.2	23.2
Driver		6.4
Hazmat		4.4

Licensing and Insurance

(As of 01/15/2026 updated hourly from L&I )

Active For-Hire Authority
Type	Yes/No	MC#/MX#
Property	No
Passenger	Yes	MC-116313
Household Goods	No
Broker	No

BASIC Status (Public Passenger Carrier View)

Behavior Analysis & Safety Improvement Categories (BASICs) Based on a 24-month record ending December 26, 2025

On-Road Performance
0 Measure 0% Percentile	Not Public	0 Measure Less than 3 driver inspections	0.51 Measure Less than 5 vehicle inspections with violations	0 Measure 0% Percentile	Not Public	0 Measure Less than 5 driver inspections
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 0 Safety Event Group: No Safety Event Grouping Avg. PU × UF: 131 Segment: Straight Carrier	Not Public	Driver Inspections: 0 with HOS Compliance Violations: 0 Safety Event Group: No Safety Event Grouping	Vehicle Inspections: 24 with Vehicle Maint. Violations: 4 Safety Event Group: 21-100 relevant vehicle inspections	Driver Inspections: 0 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 0 with Driver Fitness Violations: 0 Safety Event Group: No Safety Event Grouping
Investigation Results
No Acute/Critical Violations Discovered	N/A	No Acute/Critical Violations Discovered	No Acute/Critical Violations Discovered	No Acute/Critical Violations Discovered	Not Public	No Acute/Critical Violations Discovered

Select a BASIC icon above to get details, or view your Complete SMS Profile.

Carrier may be prioritized for an intervention action and roadside inspection. Denotes this carrier exceeds the FMCSA Intervention Threshold relative to its safety event grouping based upon roadside data and/or has been cited with one or more Acute/Critical Violations within the past 12 months during an investigation. Therefore, this carrier may be prioritized for an intervention action and roadside inspection.

Violation Summary

Violations: 6


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

393.11	No or defective lighting devices or reflective material as required	1	0	3	Vehicle Maint.
393.41-BNPB	Brake - Inoperative or missing parking brake on power unit.	1	1	4	Vehicle Maint.
393.83(h)	Exhaust - Not securely fastened to the vehicle.	1	0	1	Vehicle Maint.
396.17(c)	Operating a CMV without proof of a periodic inspection	3	0	4	Vehicle Maint.

Inspection History

Total Inspections: 24


Report			Vehicle			Measure
Inspection Date	Number	State	Plate Number	Plate State	Type	Severity Weight (SW)	Time Weight (TiW)

9/16/2025	MAZC00001684	MA	SB40830	LA	SCHOOL BUS		3
9/3/2025	MAZS00002421	MA	SB42365	MA	SCHOOL BUS		3
9/3/2025	MAZS00002422	MA	SB44167	MA	SCHOOL BUS		3
9/3/2025	MAZS00002423	MA	SB40168	MA	SCHOOL BUS		3
9/3/2025	MAZS00002424	MA	SB40830	MA	SCHOOL BUS		3
Vehicle Maint. Violation: 393.41-BNPB Brake - Inoperative or missing parking brake on power unit (OOS)						4 + 2 (OOS)
9/3/2025	MAZS00002425	MA	SB44855	MA	SCHOOL BUS		3
9/3/2025	MAZC00001669	MA	SB40540	MA	SCHOOL BUS		3
9/3/2025	MAZC00001670	MA	BU40433	MA	SCHOOL BUS		3
9/3/2025	MAZC00001671	MA	SB42828	MA	SCHOOL BUS		3
9/3/2025	MAZC00001672	MA	SB40494	MA	SCHOOL BUS		3
9/2/2025	MAZC00001665	MA	BJU43773	MA	SCHOOL BUS		3
9/2/2025	MAZS00002415	MA	SB40167	MA	SCHOOL BUS		3
9/2/2025	MAZS00002416	MA	SB42826	MA	SCHOOL BUS		3
9/2/2025	MAZS00002417	MA	SB44172	MA	SCHOOL BUS		3
9/2/2025	MAZC00001664	MA	SB42366	MA	SCHOOL BUS		3
9/2/2025	MAZC00001666	MA	SB42364	MA	SCHOOL BUS		3
9/2/2025	MAZC00001667	MA	BU44856	MA	SCHOOL BUS		3
9/2/2025	MAZC00001668	MA	SB44174	MA	SCHOOL BUS		3
9/2/2025	MAZS00002418	MA	SB40171	MA	SCHOOL BUS		3
9/2/2025	MAZS00002419	MA	SB44166	MA	SCHOOL BUS		3
9/2/2025	MAZS00002420	MA	SB44866	MA	SCHOOL BUS		3
8/15/2024	MAZS00002039	MA	BU43774	MA	SCHOOL BUS		1
Vehicle Maint. Violation: 396.17(c) Operating a CMV without proof of a periodic inspection						4
8/15/2024	MAZS00002040	MA	BU43772	MA	SCHOOL BUS		1
Vehicle Maint. Violation: 393.11 No or defective lighting devices or reflective material as required						3
Vehicle Maint. Violation: 396.17(c) Operating a CMV without proof of a periodic inspection						4
8/15/2024	MAZS00002041	MA	BU44856	MA	SCHOOL BUS		1
Vehicle Maint. Violation: 396.17(c) Operating a CMV without proof of a periodic inspection						4
Vehicle Maint. Violation: 393.83(h) Exhaust - Not securely fastened to the vehicle						1

Reviewed-Not Preventable Crash Activity (vehicles involved in crashes)

Total Number of Crashes: 0

This carrier has no crashes to display.

Crashes Included in SMS (vehicles involved in crashes)

Total Number of Crashes: 5


Report			Vehicle		Crash				Measure = Sum of the Total Weight (TotW)
Date	Number	State	Plate Number	Plate State	Fatal	Inj.	Tow.	HM	Severity Weight (SW)	Time Weight (TiW)	Total Weight (TotW)

6/6/2025	MATBC0035303	MA	SB44855	MA	0	1	Yes	No	2	2	4
1/14/2025	MATBC0034654	MA	44157	MA	0	1	Yes	No	2	2	4
12/14/2024	MATBC0034358	MA	SB27072	MA	0	0	Yes	No	1	1	1
4/22/2024	MATBC0032764	MA	SB44870	MA	0	0	Yes	No	1	1	1
3/14/2024	MATBC0032540	MA	42366	MA	0	2	Yes	No	2	1	2

Investigation Results

Acute/Critical Violations: 0

This carrier has no Acute/Critical violations to display.

Summary of Activities

The summary includes information on the 5 most recent investigations and 24 months of inspections and crash history.

Most Recent Investigation: 9/5/2025 (Compliance Review)
Total Inspections: 24
- Total Inspections without Violations used in SMS: 20
- Total Inspections with Violations used in SMS: 4
Total Crashes* : 5

*Crashes listed represent a motor carrier’s involvement in reportable crashes, regardless of the carrier’s or driver’s role in the crash. Continue for details.

Continue for more Crash, Inspection & Investigation Details

Carrier Registration

Carrier Registration Details Subject to Passenger Threshold Update Registration Info

Enforcement Cases

(Six years as of 01/15/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 106905

Complete SMS Profile Carrier History Downloads

Summary of Activities (as of 12/26/2025, updated monthly)

The summary includes information on the 5 most recent investigations and 24 months of inspections and crash history.

Most Recent Investigation: 9/5/2025 (Compliance Review)	Total Inspections: 24 Total inspections without violations used in SMS: 20 Total inspections with violations used in SMS: 4	Total Crashes: 5*
9/5/2025 (Compliance Review) 10/22/2008 (Compliance Review)	# Insp. OOS Driver Inspections 0 0.0% Vehicle Inspections 24 4.2% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 3 Towaway Crashes 2

*Crashes listed represent a motor carrier’s involvement in reportable crashes, regardless of the carrier’s or driver’s role in the crash. Continue for details.

Downloads

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Average PU × Utilization Factor (as of 12/26/2025, updated monthly)

The SMS normalizes the Unsafe Driving and Crash Indicator BASICs measure by carrier size (i.e., a hybrid power unit and vehicle miles travelled measure) to account for exposure. Carrier size is defined as average power units multiplied by the utilization factor.

131 Average PU × Utilization Factor = 131 Average Power Units × 1 Utilization Factor

Average Power Units
Utilization Factor

In order to account for changes in a carrier's fleet size during the previous 24 months an average power unit value is used in the calculation to determine a carrier's Unsafe Driving BASIC and Crash Indicator measures.

131 Average Power Units = 147 Current Power Units + 123 Power Units 6 Months Ago + 123 Power Units 18 Months Ago
3

The Utilization Factor is a multiplier that adjusted the average PU values based on the utilization in terms of VMT per average PU.

Determine Carrier Segment: Straight
Straight trucks/other vehicles constituting more than 30% of the total PU
U.S. DOT# 106905 = 100% Straight trucks/other vehicles
Determine VMT per Average Power Unit
10,381 VMT per Average Power Unit = 1,360,000 VMT From Registration (MCS-150) ÷ 131 Average Power Units

Based on Step 1 and 2 calculate the Utilization Factor

Straight Segment
Meets Criteria	VMT per Avgerage PU	Utilization Factor
	< 20,000	1
	20,000 – 60,000	1 = VMT per PU ÷ 20,000
	60,000 – 200,000	3
	> 200,000	1
	No Recent VMT Information	1

Use of SMS Data/Information

FAST Act of 2015:

Readers should not draw conclusions about a carrier's overall safety condition simply based on the data displayed in this system. Unless a motor carrier has received an UNSATISFACTORY safety rating under part 385 of title 49, Code of Federal Regulations, or has otherwise been ordered to discontinue operations by the Federal Motor Carrier Safety Administration, it is authorized to operate on the Nation's roadways.

Safety Measurement System:

The data in the Safety Measurement System (SMS) is performance data used by the Agency and Enforcement Community. A symbol, based on that data, indicates that FMCSA may prioritize a motor carrier for further monitoring.

The symbol is not intended to imply any federal safety rating of the carrier pursuant to 49 USC 31144. Readers should not draw conclusions about a carrier's overall safety condition simply based on the data displayed in this system. Unless a motor carrier in the SMS has received an UNSATISFACTORY safety rating pursuant to 49 CFR Part 385, or has otherwise been ordered to discontinue operations by the FMCSA, it is authorized to operate on the nation's roadways.

Motor carrier safety ratings are available at http://safer.fmcsa.dot.gov and motor carrier licensing and insurance status are available at http://li-public.fmcsa.dot.gov/.