They should think about flexible speed limits. It might be OK for the speed limit to be set at 60kph during the day, but I think 80-90kph is more appropriate at night.
Highways on the other hand, should never have speed limits. But considering how well our people take care of their cars, the G decided that it was only fair to have one.
My idea;
Abolish speed limit on the highway.
Compulsory car checks every 2 or so years.
Make it compulsory to send your car for a Puspakom checkup every 2 years or so to verify its road-worthiness. Other than that, neither the JPJ nor the Police can fine you for having a modified car. It's been working for ages here in Japan. Why not at home? Oh I forgot.. crook cops. Revving other people's cars like it's no one else's business. Oh here's an idea, more revs means more sound.. duh.. (I might just install a rev limiter on my car.. and since they're so dumb, they probably won't know why the car can't rev past 5000rpm)