I live on a busy road, and there is a traffic collision in front of my house every day.
Wow, that is a lot.  Any serious ones?  They can often cause injury, death or property damage
No deaths, thankfully, but the jaws of life were used last month.  The girl who got hit lived.  I don't know why there are so many.
A lot of things could be at fault.  Car design, speed, driver skill, and other things can contribute.  
Since there are so many, I wonder if the traffic collisions are caused by the design of the road.
They can.  Road design and environment are some major causes as well.  Not to mention any driver impairment is a cause too
Oh yes.  The jaws of life accident was a drunk driver who collided into the girl trying to turn left.
and behavior, notably distracted driving, speeding and street racing. Worldwide, motor vehicle collisions lead to death and disability as well as financial costs to both society and the individuals involved.
In 2013, 54 million people worldwide sustained injuries from traffic collisions. This resulted in 1.4 million deaths in 2013, up from 1.1 million deaths in 1990. About 68,000 of these occurred in children less than five years old. Almost all high-income countries have decreasing death rates, while the majority of low-income countries have increasing
were killed.
The observation dome car behind the day coach suffered serious damage, and was also hit by a freight car, which was thrown into the air by the force of the collision. One of its occupants was killed. The others were able to escape either through a window in the dome that had been broken by passengers, or through the hole left by the freight car. The two sleepers following the dome car derailed and were thrown on their sides. There were no deaths in these cars, but there