Safety Measurement System - Complete SMS Profile (U.S. DOT# 496152)

H I STONE & SON INC

U.S. DOT#: 496152

Address: 313 MAIN STREET NORTH
SOUTHBURY, CT 06488
Number of Vehicles: 61
Number of Drivers: 63
Number of Inspections: 37

Safety Rating & OOS Rates

(As of 01/27/2026 updated daily from SAFER )

SATISFACTORY

(Rating Date: 04/09/2007)

Out of Service Rates

Type	OOS %	National Avg %
Vehicle	31.8	23.2
Driver	12.5	6.4
Hazmat		4.4

Licensing and Insurance

(As of 01/27/2026 updated hourly from L&I )

Active For-Hire Authority
Type	Yes/No	MC#/MX#
Property	Yes	MC-462647
Passenger	No
Household Goods	No
Broker	No

BASIC Status (Public Property Carrier View)

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

On-Road Performance
1.11 Measure	Not Public	0 Measure	8.40 Measure	0 Measure	Not Public	1.39 Measure
On-Road Performance Detail
Driver Inspections with Unsafe Driving Violations: 11 Safety Event Group: 9-18 driver inspections with Unsafe Driving Violations Avg. PU × UF: 116.2 Segment: Straight Carrier	Not Public	Driver Inspections: 37 with HOS Compliance Violations: 0 Safety Event Group: 21-100 relevant driver inspections	Vehicle Inspections: 21 with Vehicle Maint. Violations: 10 Safety Event Group: 21-100 relevant vehicle inspections	Driver Inspections: 37 with Drugs/Alcohol Violations: 0 Safety Event Group: No Safety Event Grouping	Not Public	Driver Inspections: 37 with Driver Fitness Violations: 4 Safety Event Group: 21-100 relevant driver inspections
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.

Violation Summary

Violations: 53


Violations	Description	# Violations	# OOS Violations	Violation Severity Weight	BASIC

392.16	Failing to use seat belt while operating a CMV	2	0	7	Unsafe Driving
392.16-D	Driver - Failed to use seat belt while operating a CMV.	1	0	7	Unsafe Driving
392.2LV	Lane Restriction violation	3	0	3	Unsafe Driving
392.2-SLLS3	State/Local Laws - Speeding 11-14 miles per hour over the speed limit.	2	0	7	Unsafe Driving
392.2-SLLS4	State/Local Laws - Speeding 15 or more miles per hour over the speed limit.	4	0	10	Unsafe Driving
392.2-SLLTCD	State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g., safety offical, signal, sign, light, lane marking, other.	1	0	5	Unsafe Driving
383.23(a)(2)	Operating a CMV without a CDL	1	1	8	Driver Fitness
383.23A2-LCDLN	License (CDL) - Operate a CMV and does not possess a valid CDL.	2	2	8	Driver Fitness
383.51A-LCDLRSWD	License (CDL) - A person required to have a CLP or CDL who is disqualified must not drive a CMV.	1	1	8	Driver Fitness
383.51A-NSIN	Driving a CMV while CDL is suspended for a non-safety-related reason and in the state of driver's license issuance.	1	1	5	Driver Fitness
383.71H	Failing to submit medical certification documentation as required.	2	0	1	Driver Fitness
391.41(a)	Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency. History of either failing to produce a medical certificate or having an expired medical certificate.	1	0	1	Driver Fitness
392.9A2-C	Cargo - Vehicle components or dunnage not secured.	1	1	1	Vehicle Maint.
393.134B-CRHLC	Roll-on/Roll-off/Hook Lift Containers - Improper securement of a roll-on/roll-off and hook lift container.	1	1	7	Vehicle Maint.
393.209E-SPSLA	Steering - Power steering leaking anywhere.	1	0	6	Vehicle Maint.
393.45B2UV	Brake Hose or Tubing Chafing and/or Kinking Under Vehicle	1	1	4	Vehicle Maint.
393.48(a)	Inoperative/defective brakes	1	0	4	Vehicle Maint.
393.55(c)(2)	CMV other than truck-tractor manufactured on or after March 1, 1998 not equipped with an antilock brake system.	1	0	4	Vehicle Maint.
393.55(e)	No or Defective ABS Malfunction Indicator Lamp for trailer manufactured after 03/01/1998	2	0	4	Vehicle Maint.
393.55E-B	Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 1998.	1	0	4	Vehicle Maint.
393.75(a)	Flat tire or fabric exposed	1	1	8	Vehicle Maint.
393.75G-TAOW	Tires - All others, weight carried exceeds tire load limit.	1	1	3	Vehicle Maint.
393.78	Wipers - Inoperative / missing / damaged wipers.	2	0	1	Vehicle Maint.
393.9	Inoperable Required Lamp	1	0	2	Vehicle Maint.
393.95A1	Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.	1	0	2	Vehicle Maint.
393.95A4-EEUS	Emergency Equipment - Fire Extinguishers - unsecured.	1	0	2	Vehicle Maint.
393.95(f)	Emergency Equipment - Stopped vehicle warning devices missing or improper.	2	0	2	Vehicle Maint.
393.9A-LCL	Lighting - Clearance lamp(s) inoperative.	1	0	2	Vehicle Maint.
393.9A-LFTSI	Lighting - Front - Turn signal - inoperative.	1	0	6	Vehicle Maint.
393.9A-LIL	Lighting - Identification lamp(s) inoperative.	1	0	2	Vehicle Maint.
393.9A-LLPL	Lighting - License plate lamp inoperative.	2	0	2	Vehicle Maint.
393.9A-LRLI	Lighting - Tail lamp - Any inoperative.	1	0	6	Vehicle Maint.
393.9A-LSLI	Lighting - Stop lamps - Any inoperative.	1	0	6	Vehicle Maint.
393.9A-LSML	Lighting - Side marker lamp(s) inoperative.	1	0	2	Vehicle Maint.
393.9A-LTSI	Lighting - Turn signal - Any inoperative on the rearmost vehicle.	1	1	6	Vehicle Maint.
393.9B-LRLIWR	Lighting - Tail lamp - Both lamps on rearmost vehicle inoperative when required to be on.	1	1	6	Vehicle Maint.
396.3A1B	Brakes (general) Explain:	1	1	4	Vehicle Maint.
396.3A1-BALAC	Brake - Audible air leak from a brake chamber	1	0	4	Vehicle Maint.
396.3(a)1BOS	Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination.	1	1	0	Vehicle Maint.
396.3A1-TAOCV	Tires - All others, in contact with a part of the vehicle.	1	1	8	Vehicle Maint.

Inspection History

Total Inspections: 37


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

10/16/2025	MACP00005680	MA	78835A	CT	TRUCK TRACTOR		3
10/15/2025	CT3091006199	CT	78905A	CT	TRUCK TRACTOR		3
10/8/2025	CT3014004685	CT	66235A	CT	STRAIGHT TRUCK		3
Unsafe Driving Violation: 392.2-SLLS3 State/Local Laws - Speeding 11-14 miles per hour over the speed limit						7
9/10/2025	NYSPK4020235	NY	74504A	CT	STRAIGHT TRUCK		3
Unsafe Driving Violation: 392.2-SLLTCD State/Local Laws - Failed to obey a traffic control device - Permanent or Temporary - e.g., safety official, signal, sign, light, lane marking, other						5
9/2/2025	CT3077A00578	CT	39485A	CT	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.209E-SPSLA Steering - Power steering leaking anywhere.						6
8/20/2025	CT3091006061	CT	30597A	CT	STRAIGHT TRUCK		3
Vehicle Maint. Violation: 393.95(f) Emergency Equipment - Stopped vehicle warning devices missing or improper						2
Vehicle Maint. Violation: 393.134B-CRHLC Roll-on/Roll-off/Hook Lift Containers - Improper securement of a roll-on/roll-off and hook lift container (OOS)						7 + 2 (OOS)
Vehicle Maint. Violation: 393.78 Wipers - Inoperative / missing / damaged wipers						1
Vehicle Maint. Violation: 393.95A1 Emergency Equipment - Fire Extinguishers - no fire extinguisher present or not properly rated.						2
8/11/2025	CT3065A00153	CT	74478A	CT	TRUCK TRACTOR		3
Vehicle Maint. Violation: 393.9A-LSML Lighting - Side marker lamp(s) inoperative						2
Vehicle Maint. Violation: 393.9A-LCL Lighting - Clearance lamp(s) inoperative						2
Vehicle Maint. Violation: 393.9A-LLPL Lighting - License plate lamp inoperative						2
Vehicle Maint. Violation: 393.9A-LRLI Lighting - Tail lamp - Any inoperative						6
Vehicle Maint. Violation: 393.55E-B Air Brake - ABS malfunction lamp defective on trailers manufactured on or after March 1, 1998						4
4/30/2025	CT0481000165	CT	AE03301	CT	STRAIGHT TRUCK		2
Vehicle Maint. Violation: 396.3A1-BALAC Brake - Audible air leak from a brake chamber						4
Vehicle Maint. Violation: 393.9A-LSLI Lighting - Stop lamps - Any inoperative.						6
Vehicle Maint. Violation: 393.9A-LFTSI Lighting - Front - Turn signal - inoperative						6
Vehicle Maint. Violation: 392.9A2-C Cargo - Vehicle components or dunnage not secured (OOS)						1 + 2 (OOS)
Vehicle Maint. Violation: 393.9A-LTSI Lighting - Turn signal - Any inoperative on the rearmost vehicle. (OOS)						6 + 2 (OOS)
Vehicle Maint. Violation: 396.3(a)1BOS Brake - Defective brake(s) are equal to or greater than 20% of the service brakes on the vehicle/combination (OOS)						0 + 2 (OOS)
2/8/2025	CT1147002319	CT	66234A	CT	STRAIGHT TRUCK		2
Unsafe Driving Violation: 392.2-SLLS4 State/Local Laws - Speeding 15 or more miles per hour over the speed limit						10
1/29/2025	MADZ00000004	MA	57025A	CT	TRUCK TRACTOR		2
Driver Fitness Violation: 383.23A2-LCDLN License (CDL) - Operate a CMV and does not possess a valid CDL (OOS)						8 + 2 (OOS)
1/7/2025	MACT00003147	MA	71809A	CT	TRUCK TRACTOR		2
1/2/2025	CT3064001392	CT	K93175	CT	STRAIGHT TRUCK		2
Vehicle Maint. Violation: 393.95A4-EEUS Emergency Equipment - Fire Extinguishers - unsecured						2
Vehicle Maint. Violation: 393.95(f) Emergency Equipment - Stopped vehicle warning devices missing or improper						2
Vehicle Maint. Violation: 393.9A-LIL Lighting - Identification lamp(s) inoperative						2
Vehicle Maint. Violation: 393.9A-LLPL Lighting - License plate lamp inoperative						2
Vehicle Maint. Violation: 396.3A1-TAOCV Tires - All others, in contact with a part of the vehicle (OOS)						8 + 2 (OOS)
Vehicle Maint. Violation: 393.75G-TAOW Tires - All others, weight carried exceeds tire load limit (OOS)						3 + 2 (OOS)
Driver Fitness Violation: 391.41(a) Operating a property-carrying vehicle without a valid medical certificate in possession or on file with the state drivers licensing agency. History of either fail						1
Driver Fitness Violation: 383.51A-LCDLRSWD License (CDL) - A person required to have a CLP or CDL who is disqualified must not drive a CMV (OOS)						8 + 2 (OOS)
Driver Fitness Violation: 383.23A2-LCDLN License (CDL) - Operate a CMV and does not possess a valid CDL (OOS)						8 + 2 (OOS)
1/2/2025	CT3022000983	CT	74478A	CT	TRUCK TRACTOR		2
Vehicle Maint. Violation: 393.9B-LRLIWR Lighting - Tail lamp - Both lamps on rearmost vehicle inoperative when required to be on (OOS)						6 + 2 (OOS)
12/31/2024	CT3078003194	CT	74478A	CT	TRUCK TRACTOR		2
Unsafe Driving Violation: 392.2-SLLS3 State/Local Laws - Speeding 11-14 miles per hour over the speed limit						7
12/17/2024	CT3019005943	CT	59009A	CT	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.16-D Driver - Failed to use seat belt while operating a CMV						7
12/12/2024	CT3090004274	CT	74031A	CT	TRUCK TRACTOR		1
12/6/2024	CT3090004264	CT	67854A	CT	TRUCK TRACTOR		1
11/8/2024	CT3090004213	CT	75090A	CT	TRUCK TRACTOR		1
11/7/2024	CT3090004207	CT	62105A	CT	TRUCK TRACTOR		1
9/27/2024	CT3022000777	CT	57113A	CT	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.2LV Lane Restriction violation						3
9/19/2024	NYSPK0230672	NY	74504A	CT	STRAIGHT TRUCK		1
8/25/2024	CT1162002459	CT	76971A	CT	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.2-SLLS4 State/Local Laws - Speeding 15 or more miles per hour over the speed limit						10
8/20/2024	CT3090004067	CT	61804A	CT	TRUCK TRACTOR		1
8/15/2024	CT3070006218	CT	57025A	CT	TRUCK TRACTOR		1
8/5/2024	CT3090004036	CT	67051A	CT	TRUCK TRACTOR		1
7/22/2024	CT3019005563	CT	30597A	CT	STRAIGHT TRUCK		1
Driver Fitness Violation: 383.23(a)(2) Operating a CMV without a CDL (OOS)						8 + 2 (OOS)
Vehicle Maint. Violation: 393.55(c)(2) CMV other than truck-tractor manufactured on or after March 1, 1998 not equipped with an antilock brake system						4
Vehicle Maint. Violation: 393.75(a) Flat tire or fabric exposed (OOS)						8 + 2 (OOS)
Vehicle Maint. Violation: 393.78 Wipers - Inoperative / missing / damaged wipers						1
Driver Fitness Violation: 383.71H License (CDL) - CDL or CLP holder possesses a valid medical certificate but is not on file with the issuing state driver's licensing agency as required						1
7/10/2024	CT3069000075	CT	65539A	CT	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.55(e) No or Defective ABS Malfunction Indicator Lamp for trailer manufactured after 03/01/1998						4
Vehicle Maint. Violation: 393.9 Inoperable Required Lamp						2
6/13/2024	NYSPE0274552	NY	67331A	CT	TRUCK TRACTOR		1
Vehicle Maint. Violation: 393.55(e) No or Defective ABS Malfunction Indicator Lamp for trailer manufactured after 03/01/1998						4
6/7/2024	CT3119002023	CT	67331A	CT	TRUCK TRACTOR		1
Driver Fitness Violation: 383.51A-NSIN Driving a CMV while CDL is suspended for a non-safety-related reason and in the state of driver's license issuance (OOS)						5 + 2 (OOS)
Vehicle Maint. Violation: 393.45B2UV Brake Hose or Tubing Chafing and/or Kinking Under Vehicle (OOS)						4 + 2 (OOS)
Vehicle Maint. Violation: 393.48(a) Inoperative/defective brakes						4
Vehicle Maint. Violation: 396.3A1B Brakes (general) Explain: (OOS)						4 + 2 (OOS)
Driver Fitness Violation: 383.71H License (CDL) - CDL or CLP holder possesses a valid medical certificate but is not on file with the issuing state driver's licensing agency as required						1
5/31/2024	CT3019005446	CT	65539A	CT	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.2LV Lane Restriction violation						3
Unsafe Driving Violation: 392.16 Failing to use seat belt while operating a CMV						7
5/25/2024	CT3019005422	CT	75090A	CT	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.2-SLLS4 State/Local Laws - Speeding 15 or more miles per hour over the speed limit						10
3/6/2024	CT3029002121	CT	74031A	CT	TRUCK TRACTOR		1
Unsafe Driving Violation: 392.16 Failing to use seat belt while operating a CMV						7
3/4/2024	MACW00002654	MA	74031A	CT	TRUCK TRACTOR		1
2/21/2024	CT0613001247	CT	17446A	CT	STRAIGHT TRUCK		1
Unsafe Driving Violation: 392.2LV Lane Restriction violation						3
Unsafe Driving Violation: 392.2-SLLS4 State/Local Laws - Speeding 15 or more miles per hour over the speed limit						10
2/15/2024	CT0613001241	CT	67855A	CT	TRUCK TRACTOR		1
2/1/2024	NYD808600164	NY	74504A	CT	STRAIGHT TRUCK		1
1/23/2024	CT3082000999	CT	74504A	CT	STRAIGHT TRUCK		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: 1


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)

7/3/2025	CT2500241333	CT	74504A	CT	0	0	Yes	No	1	3	3

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: 1/9/2024 (Non-Ratable Review)
Total Inspections: 37
- Total Inspections without Violations used in SMS: 15
- Total Inspections with Violations used in SMS: 22
Total Crashes* : 1

*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 General Threshold Update Registration Info

Enforcement Cases

(Six years as of 01/27/2026 updated monthly from FMCSA )

No penalties found

Tools/Resources

SMS Methodology How to Improve Request a Data Review

For U.S. DOT# 496152

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: 1/9/2024 (Non-Ratable Review)	Total Inspections: 37 Total inspections without violations used in SMS: 15 Total inspections with violations used in SMS: 22	Total Crashes: 1*
1/9/2024 (Non-Ratable Review) 11/5/2019 (Non-Ratable Review) 11/29/2012 (Non-Ratable Review) 3/29/2007 (Compliance Review) 10/10/2002 (Compliance Review)	# Insp. OOS Driver Inspections 37 10.8% Vehicle Inspections 21 28.6% Placardable HM Inspections 0 0.0% % Placardable HM Inspections 0.0%	Fatal Crashes 0 Injury Crashes 0 Towaway Crashes 1

*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.

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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.

116.2 Average PU × Utilization Factor = 61.3 Average Power Units × 1.8953 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.

61.3 Average Power Units = 61 Current Power Units + 61 Power Units 6 Months Ago + 62 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# 496152 = 39% Straight trucks/other vehicles
Determine VMT per Average Power Unit
37,905 VMT per Average Power Unit = 2,324,734 VMT From Registration (MCS-150) ÷ 61.3 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	1.8953 = 37,905 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/.