CORNERSTONE SITE SERVICES LLC
AUTHORIZEDUSDOT
2520567
MC Number
N/A
Fleet Size
10
Total Drivers
6
Last updated: March 14, 2026
Safety overview
CORNERSTONE SITE SERVICES LLC is a small intrastate only (hazmat) motor carrier based in ROUND ROCK, Texas, operating 10 power units with 6 drivers. 1 of their 5 BASIC scores sits above the 75th percentile intervention threshold. The rest fall within acceptable ranges. Their driver out-of-service rate of 0.0% comes in under the 5.51% national average. They have 2 crashes on file (2 with injuries). FMCSA records show 6 inspections for this carrier.
BASIC scores
SMS PercentilesHigher percentile = worse performance relative to peers. Scores at or above 75% may trigger an FMCSA investigation.
Out-of-service rates vs. national average
An out-of-service order means the driver or vehicle was pulled from operation during a roadside inspection.
For reference, the average driver OOS rate in Texas is 13.3% and the average vehicle OOS rate is 29.7% across 174,809 carriers.
Company details
- Entity Type
- N/A
- Carrier Operation
- Intrastate Only (Hazmat)
- Operation Classification
- Private (Property)
- Cargo Carried
- N
- Hazmat
- Yes
- Safety Rating Date
- N/A
What are BASIC scores?
FMCSA tracks carrier performance through its Safety Measurement System (SMS), which scores carriers across six categories called BASICs. Each score is a percentile from 0 to 100, based on inspection and crash data from the past 24 months.
A score of 65 means the carrier performed worse than 65% of its peers. Anything above 75% can trigger FMCSA alerts or investigations. Brokers vetting new carriers should pay attention to scores above 50%.
- Unsafe driving
- Speeding, reckless driving, improper lane changes, seatbelt violations. All based on what officers find during roadside inspections.
- HOS / Fatigue
- Hours-of-service violations, logbook problems, driving past the allowed limits. Fatigued driving is one of the top causes of truck crashes in the US.
- Driver fitness
- Licensing problems, expired medical certificates, and other driver qualification issues.
- Controlled substances
- Drug and alcohol testing violations, possession, or impairment.
- Vehicle maintenance
- Brake problems, tire issues, lighting defects, load securement failures. Caught during the vehicle portion of roadside inspections.
- Crash indicator
- Based on crash history from state-reported data. Higher percentile means more crashes relative to the carrier's size and mileage.
Inspections
6
Total
50%
Driver %
Crash history
2
Total Crashes
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Frequently asked questions
Is CORNERSTONE SITE SERVICES LLC authorized to operate?
Yes. CORNERSTONE SITE SERVICES LLC (USDOT #2520567) currently holds "AUTHORIZED" status with FMCSA. They're registered as an intrastate only (hazmat) carrier.
What is CORNERSTONE SITE SERVICES LLC's safety record?
CORNERSTONE SITE SERVICES LLC has 1 BASIC score above the 75th percentile, which is where FMCSA may look into a carrier. Brokers should weigh these scores alongside the inspection history and crash data before making a decision.
How many trucks does CORNERSTONE SITE SERVICES LLC operate?
CORNERSTONE SITE SERVICES LLC operates 10 power units with 6 drivers on file. That makes them a small carrier.
Does CORNERSTONE SITE SERVICES LLC transport hazardous materials?
Yes. CORNERSTONE SITE SERVICES LLC is flagged for hazardous materials transportation with FMCSA. That means additional safety requirements and more frequent inspections.
Where is CORNERSTONE SITE SERVICES LLC located?
CORNERSTONE SITE SERVICES LLC is based in ROUND ROCK, Texas at 4801 UNIVERSITY BLVD #410, 78665. Phone: (512) 410-1843.
What are CORNERSTONE SITE SERVICES LLC's out-of-service rates?
CORNERSTONE SITE SERVICES LLC's driver out-of-service rate is 0.0%, compared to the national average of 5.51%. Below average, which is a good sign. Their vehicle out-of-service rate is 16.7% (national average: 20.72%). Below average, suggesting the fleet is well-maintained.