https://ustruck.com/wp-content/uploads/2019/12/Colorado-CDL-Manual-2018.pdf
I took this excerpt from the Colorado CDL Manual, located on page 8 (link above). It discusses the CDL Classes, Endorsements and Restrictions.
The more endorsements you have, the more marketable you are, which means you can get a better job, you can make more money and work for better companies. It's my recommendation that once you pass your CDL test and get your license, spend a few days studying the manual and go get all of your endorsements. It makes you extremely valuable to the industry and to the better paying companies. The tests are pretty easy and they cost like $14 each I think.
If you have an iPhone, you can download the DMV Genie Permit Practice Test and take practice tests and they are very close to the Colorado tests. Study your manual, take the practice tests and then go get your endorsements. It's that easy.
CDL Overview (Page 8 of the CO CDL Manual)
CDL Vehicle Classes
Class A — Combination Vehicles. Any combination of vehicles with a gross combination weight rating (GCWR) of 26,001 pounds or more provided the gross vehicle weight rating (GVWR) of the vehicle(s) being towed is in excess of 10,000 pounds.
Class B — Heavy Straight Vehicles. Any single vehicle with a GVWR of 26,001 pounds or more, or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR.
Class C — Small Vehicles. Any single vehicle or combination of vehicles that meets neither the de nition of Class A, nor that of Class B, but that is either designed to transport 16 or more passengers, including the driver, or is used in the transportation of materials found to be hazardous for the purposes of the Hazardous Materials Transportation Act and which require the motor vehicle to be placarded under the Hazardous Materials Regulations 49 CFR part 172, Subpart F.
Representative Vehicle. For purposes of taking the skill tests, a representative vehicle for a given vehicle class is any commercial motor vehicle that meets the de nition of that vehicle class. A truck tractor is designed to operate with a towed unit(s), typically a semi-trailer and therefore could only be used as a representative vehicle when connected to a semi-trailer, for the Class A CDL.
Relation Between Vehicle Classes. Each driver applicant who desires to operate in a different CMV group from the one that his or her CDL authorizes is required to take and pass all related tests, except the following:
I took this excerpt from the Colorado CDL Manual, located on page 8 (link above). It discusses the CDL Classes, Endorsements and Restrictions.
The more endorsements you have, the more marketable you are, which means you can get a better job, you can make more money and work for better companies. It's my recommendation that once you pass your CDL test and get your license, spend a few days studying the manual and go get all of your endorsements. It makes you extremely valuable to the industry and to the better paying companies. The tests are pretty easy and they cost like $14 each I think.
If you have an iPhone, you can download the DMV Genie Permit Practice Test and take practice tests and they are very close to the Colorado tests. Study your manual, take the practice tests and then go get your endorsements. It's that easy.
CDL Overview (Page 8 of the CO CDL Manual)
CDL Vehicle Classes
Class A — Combination Vehicles. Any combination of vehicles with a gross combination weight rating (GCWR) of 26,001 pounds or more provided the gross vehicle weight rating (GVWR) of the vehicle(s) being towed is in excess of 10,000 pounds.
Class B — Heavy Straight Vehicles. Any single vehicle with a GVWR of 26,001 pounds or more, or any such vehicle towing a vehicle not in excess of 10,000 pounds GVWR.
Class C — Small Vehicles. Any single vehicle or combination of vehicles that meets neither the de nition of Class A, nor that of Class B, but that is either designed to transport 16 or more passengers, including the driver, or is used in the transportation of materials found to be hazardous for the purposes of the Hazardous Materials Transportation Act and which require the motor vehicle to be placarded under the Hazardous Materials Regulations 49 CFR part 172, Subpart F.
Representative Vehicle. For purposes of taking the skill tests, a representative vehicle for a given vehicle class is any commercial motor vehicle that meets the de nition of that vehicle class. A truck tractor is designed to operate with a towed unit(s), typically a semi-trailer and therefore could only be used as a representative vehicle when connected to a semi-trailer, for the Class A CDL.
Relation Between Vehicle Classes. Each driver applicant who desires to operate in a different CMV group from the one that his or her CDL authorizes is required to take and pass all related tests, except the following:
-
A driver who has passed the knowledge and skill tests
for a combination vehicle (Class A) may operate a heavy
straight vehicle (Class B) or a small vehicle (Class
C), provided that he or she possesses the required endorsement(s); and
-
A driver who has passed the knowledge and skill tests
for a heavy straight vehicle (Class B) may operate any
small vehicle (Group C), if he or she possesses the
required endorsement(s).
-
A driver that operates vehicles with air-over hydraulic brake
systems or air-assisted brake systems will not be allowed
to drive vehicles equipped with “full” air brake systems.
CDL Endorsements
T – Double/Triple Trailers – a knowledge test P – Passenger – knowledge and skill tests
N – Tank Vehicle – a knowledge test
H – Hazardous Materials – a knowledge test S – School Bus – knowledge and skill tests X – Hazmat/Tanker Combination
CDL Restrictions
C – Corrective lenses.
L – Air brake restriction. If an applicant either fails the air brake component of the knowledge test, or performs the skill tests in a vehicle not equipped with a “full” air brake system, the person is restricted from operating a CMV equipped with a “full” air brake system.
K – Intrastate only. For individuals between the ages of
18 through 20, or for individuals who do not meet
the Department of Transportation (DOT) medical requirements but have been issued a waiver from the Colorado State Patrol (CSP) to operate a CDL vehicle.
E – No manual transmission. Tests in a vehicle with a transmission other than a manual.
M – No Class A passenger vehicle. Tests in Class B Passenger Vehicle.
N – No Class A and B passenger vehicle. Tests in Class C Passenger Vehicle.
O – No tractor trailer. Tests in a vehicle with a coupling system other than a Fifth Wheel.
P – No passengers in a CMV bus. Passengers not allowed on the vehicle.
V – Medical variance.
X – No cargo in CMV tank vehicle. Tank vehicle must be
purged of all liquid.
Z – No full air brake equipped CMV. Tests in Vehicle with Air over Hydraulic Brake type system.
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