有哪位英语大神能帮我的一段英文改改错..

The graphs show the cameras and radar are more successful in supervision than police cars.
So my hometown gouvernment installed many cameras and radar last year.
Before they were installed,my father likes driving a little faster than limited speed about 80 km/h in downtown.
But things changed after the cameras and radar were installed.
Once my father was going to pick me and my sister up after classes.
He was late,so he speeded over limitation 2 km/h when he was driving.
However,he received a ticket from traffic police next day,.
The fine was really high.
After that he never showed the idea of speeding
大概改了一下.希望能通顺写.

are 应为 is 有点拿不准... The graphs show the cameras and radar is much more successful than police cars. So my hometown had added many cameras and radar last year. Before they were set up, my father liked ...