These days traffic systems are well developed. Among them people often say that airplanes have made great impact on their life. However I think cars are more affective than airplanes. I will explain this idea with the concept of effectiveness and stress.
Frist, Cars are very effective. This is because there are more cars than airplanes, People would feel it more friendly and useful.
For example, Although I take an aiplane one time a year, I drive my car every day. Two years ago my car was out of order. I could not help but to walk to my school. For class I had to wake up one hour early than other days. I felt very inconvenient right away. I think this case is too easy to experience for all people.
Second, Cars release our stress. This is because people can go somewhere easily. For example my friend jack didn't have a car. He always ride a bike. One day he should visit his cousin in Busan. He dicided to take airplane. However the weather was so bad he couldn't go Busan by airplane. he said it was so stressful for him. Then His father lent a car and they went Busan so easily without stress. This can happen for all of us.
For these reasons I think cars have made great impact on our life than airplane.