Why Buy a Category B+ Driving License?
You will need an endorsement for Class B if you are required to drive a car with a trailer that weighs more than 26,000 pounds. It is possible to add an endorsement the CDL class you already have by taking a new understanding and skills test.

The passing of a test in category C1+E automatically upgrade your licence to include full B+E entitlement (but subject to the weight limit of your train on your B licence). This is only applicable to UK drivers.
Passenger Endorsements
If you plan to operate one vehicle that can seat 16 or more (including the driver) for the transport of passengers the endorsement is required. You must pass the P written knowledge test and the passenger-related road skills test to be eligible for this CDL endorsement. School bus drivers need a separate CDL endorsement and must undergo an FBI background check.
The Class B with Passenger Endorsement allows you to operate vehicles that have a GVWR of 26,001 pounds or more, where the towed vehicle is not more than 10,000 pounds. School, tour, and city buses are the most common type of vehicle. This CDL class is usually utilized by professional bus drivers.
This endorsement is not required for drivers employed by an organization that doesn't transport property or people such as Realtors, plumbers, and meter readers. Your employer may require this endorsement in order to satisfy insurance or safety requirements. The Regular (Class D) Driver License with Passenger (F) Endorsement is added to Commercial Driver's License if your job is providing taxi service, shuttle bus service delivery services for flowers or pizza couriers, as well as an ambulance driver. Any CDL Classification can have a For-Hire endorsement added. The endorsement code is located on the front of your license, under the expiration date, and next to the letter "E".
Hazardous Materials Endorsements
The Hazardous Materials endorsement shows employers that you have the qualifications to transport certain types of freight. This special certification can improve your job prospects and allow you to get more lucrative driving jobs, specifically in the trucking business. It requires a higher degree of safety awareness that goes beyond normal rules of the road to include managing passengers, handling onboard emergencies, and leading evacuation procedures.
You must take a written test on hazardous materials and undergo a thorough background check by the Transportation Security Administration. This is due to the fact that these items are explosive, corrosive, or toxic, which is why only trained individuals can handle them. This certification is required by truck drivers who transport chemicals and liquid gas and construction site workers who bring materials to their job sites.
You may require a CDL endorsement P (passenger) in the event that you operate vehicles that transport passengers, like city buses and tour buses. School bus drivers require a separate S (school bus) endorsement to operate these vehicles. You can also add the tanker or N (tank vehicles) CDL endorsement to you driving license to transport gas and liquids, such as oil, gas dairy, beverage waste management, or agriculture. Some companies, like Schneider, offer HazMat (X) and tanker (H) endorsements that permit you to transport both types of cargo without requiring a separate endorsement.
The company you wish to work for will decide if you need to get additional endorsements to operate certain commercial vehicles. To ensure that you're investing your time and money in the right direction it is recommended to research the endorsements that your prospective employer requires or prefers. This will give you an idea of what qualifications to obtain prior to beginning your journey as a driver, and also reduce the risk of wasting money on unnecessary endorsements. Many companies will reimburse drivers for the costs associated with getting CDL endorsements. This is an excellent way to begin your journey as a driver.
Combination Endorsements
Having the proper endorsements gives drivers access to vehicles that they wouldn't otherwise be able to operate. This enables them to broaden their horizons and present themselves as the most polished source on the job market. Schneider recommends that drivers talk to career counselors and professionals to better understand which combinations of endorsements are most advantageous for their career goals.
For instance the T combination endorsement gives CDL Class A and B license holders the ability to drive multiple trailers, such as triple and double trailers. This requires advanced driving skills and a keen understanding of how trailers move with respect to one another, as they are more susceptible to turning and jackknifing than single trailer trucks. The X endorsement permits Class A and B CDL holders to carry HazMat through a tanker.
Trailer Endorsements
People who transport passengers for a living need to obtain their Regular (Class D) driver license enhanced with the For-Hire (F) endorsement. Examples of drivers who require this endorsement are taxi drivers chauffeurs for shuttle service couriers, delivery services and couriers (flowers pizza, flowers), and ambulance drivers. Some employees who work on commission or for their own businesses and do not transport people or property in the course of their work (such as plumbers or meter readers, Realtors) may also require the For-Hire Endorsement.
related web site "T" endorsement permits CDL holders to operate vehicles with triple or double trailers. Schneider does not pay drivers for this endorsement. The "X" endorsement permits Class A and B CDL holders to haul HazMat freight on tankers. This combination of endorsements is sometimes called a "combo" or an "all-hazards" endorsement.