Rate the following essay on its writing, argument, and language skills:
Driverless cars has it's positive and negative aspects, but in my opinion, I do think driverless cars should exist. Although, this world does have many accidents every day with humans driving, a driverless car could actually be more safer. A car itself is usually not the problem in an accident, it's the driver. So if we focused more on the car then the problem could be close to solved. Driverless cars could be very safe, even more safe than the cars now.

Car accidents happen every day, but according to Google, their driverless car has driven more than half a million miles without even crashing one time. Although, being in a car with no human driving could seem scary, it's more safer. Plus, a driverless car truly isn't driverless. There is still a human controlling the car in a a way. When the car is dealing with road work, accidenst or pulling in and out of driveways, that's when the real driver comes in and helps. The car will actually alert the driver.

A public- transport taxi system could be very important to this world. A taxi nowadays uses plenty of gas which is also plenty of money. Driverless cars would use half the fuel of today's taxi. It would even have more flexibility than a bus! Not only are driverless cars more safer, but they even use less money.

A car that only needs a driver 90% of the time, is pretty amazing. Transportation will be much more easier and faster in the future with driverless cars. They are safer, cheaper, and more easier! Although, it seems a long way from the dream of calling a driverless cab to take us wherever we need to go, the dream is actually catching up to reality, according to the founder of the Google Car project. This world grows closer to the new car everyday. Soon, driverless cars could become a reality!

Score: 4