Answer: 46 inches Explanation: Concrete slab are pour at between 46 inches for regulation. 
Treasure Coast Concrete Polishing 
Answer: 68 inches Explanation: I recommend 6" 3500PSI4500PSI concrete slabs to all of my clients wanting to install a new driveway. It might be cheaper in the short run to install a 4" 3000PSI concrete pad, but a 6"8" pad will last much longer. 
Cronin Construction & Resource Management, LLC 
Answer: 46 inches Explanation: Industry standard for light or moderate exposure exterior concrete paving or walks is 4". 
Maven Group LLC 

ProMatcher 
Answer: 46 inches Explanation: 2 inches just isn't gonna cut it with any kind of traffic on it 
Phoenix concrete services inc. 
Answer: 46 inches Explanation: the least you would want to pour anything is 4" 
caydens concrete restoration inc 
Answer: 46 inches Explanation: 4" is average.
Our company like to install 4+" 
QUALITY CONTRACTORS 

ProMatcher 
Answer: 24 inches Explanation: Home builders are not going to spend more money than they have to when installing a driveway, they also do not allow enough curing time before allowing anything heavy on it. Thats why they crack after years of driving on them. 
Charlton Team Home Renovations & Construction LLC. 
Answer: 46 inches Explanation: Place concrete at a minimum thickness of 4 inches. Increasing the thickness from 4 inches to 5 inches will add approximately 20% to your concrete cost, but will also boost your driveway's loadcarrying capacity nearly 50% 
Colorado Concrete 
Answer: 46 inches Explanation: on dryways I always recomed to put minim of 5" tick and reforced with 3# rebbars at 18"x18" 
alvaradomasonry 

ProMatcher 
Answer: 46 inches Explanation: 4 inch of concrete with rebar on 24 inch centers each way supported with rebar chairs is a good driveway for cars and trucks . Thicker for trash trucks and rv's. 
Concrete services 
Answer: 46 inches Explanation: Typical driveway is 4" minimum thickness. 
BellPro Construction LLC 
Answer: 46 inches Explanation: A number of factors go into deciding the thickness of concrete needed for you 
Black Dirt Services LLC 

ProMatcher 
Answer: 46 inches Explanation: 4 inches is standard 
DIRTCO CONSTRUCTION 
Answer: 46 inches Explanation: Installing a concrete driveway should be 4 to 5 inches thick and all edges should be turned down at 6 to 7 inches thick all the way around the drivrway 
Lals Concrete Company,LLC 
Answer: 46 inches Explanation: Most residential driveways are 46 inches. It is always good to check your local building codes and to consider things that may apply to your own situation. How many cars will you have parked at any given time? How many cars may be going in and out? What types of cars?....small compact cars, heavy trucks, or heavy recreational vehicles? These are all important things to consider and will help in determining the thickness of concrete that needs to be installed. 
Texas Precision Paving, LLC 

ProMatcher 
Answer: 24 inches Explanation: Residential concrete driveways are typically 4" 
Concrete & Beauty Design 
Answer: 46 inches Explanation: You could add fiber for strength 
Garcias Concrete Service LLC, 