As of September 1, all drivers in Texas are being subjected to new traffic and driving laws. And if you don't know them, you could face a fine.

For example, with kids back in school, law enforcement is on the lookout for people breaking new laws for school zones and school buses.

With that in mind, the state expanded its law against holding a cell phone to your ear in active school zones to other spots which are designated school crossing zones.

Fines are also increased for passing a stopped school bus loading or unloading kids, and they are even higher if you're a repeat offender.

Drivers have others expanded laws as well. For example, you must now slow to 20mph below the posted speed limit or move over a lane -- not only for law enforcement and emergency vehicles, but also for vehicles with the Texas Department of Transportation.

And here's a new law you might like concerning your car insurance: you can now show proof of insurance on your cell phone.

Texas DPS hopes the new laws provide added protection for everyone on the roads.

Below isn't a complete list of the new laws that are now in effect, but some you should know about:

HB 347 expands the current limitations on wireless communication device (cell phone) use in an active school crossing zone to include the property of a public elementary, middle, or junior high school for which a local authority has designated a school crossing zone. The use will only be restricted during the time a reduced speed limit is in effect for the school crossing zone. Further, it will not apply to vehicles that are stopped, or drivers using a hands-free device or making an emergency call.

HB 1174 amends current statute to increase the minimum fines for the misdemeanor offense of passing a stopped school bus loading or unloading children. The minimum fine increases from $200 to $500, and the maximum fine for such an offense increases from $1,000 to $1,250. The bill also enhances the penalty for a second or subsequent conviction of that offense committed within five years to a misdemeanor punishable by a minimum fine of $1,000 and a maximum fine of $2,000.

SB 181 allows a motor vehicle operator the option of using a wireless communication device (such as a cell phone) to display motor vehicle financial responsibility (proof of insurance) information as evidence of financial responsibility. The display does not constitute effective consent for a law enforcement officer, or any other person, to access the contents of the wireless communication device except to view the financial responsibility information. *This bill is effective immediately.

SB 510 requires drivers to move over or slow down (as required depending on the roadway) when approaching a stationary Texas Department of Transportation vehicle with its lights activated and not separated from the roadway by a traffic-control device. This provision expands the state's Move Over/Slow Down law, which already requires drivers to yield to tow trucks, police, fire and emergency vehicles. Violators would commit a misdemeanor offense punishable by a fine of up to $200; punishable by a fine of $500 if property damage occurs; or a Class B misdemeanor if the violation results in bodily damage.

HB 2304 lowers the population requirement from 2.2 million to one million for counties where sheriffs or deputy sheriffs can be certified by DPS to enforce federal commercial motor vehicle regulations. This will open the opportunity to Bexar, Tarrant and Travis counties.

HB 625 clarifies that the penalty for operating a vehicle on a public highway without displaying the two license plates assigned to the vehicle is a misdemeanor offense punishable by a fine not to exceed $200.

HB 3668 amends current statute to require the operator of a vehicle involved in an accident that results or is reasonably likely to result in the injury or death of a person to immediately determine whether a person is involved in the accident, and if so, whether the person requires aid, in addition to other existing statutory requirements.

SB 275 increases the penalty for leaving the scene of a motor vehicle accident resulting in the death of a person and failing to render aid from a third-degree felony to a second-degree felony. A second degree felony carries a punishment of two to 20 years in prison and an optional fine not to exceed $10,000, whereas a third degree felony carries a penalty of two to 10 years in prison and an optional fine not to exceed $10,000.

HB 124 adds Salvia divinorum (unless unharvested and growing in its natural state)  including all parts of the plant, seeds and extracts from a part of the plant  to Penalty Group 3 of the Texas Controlled Substances Act.