I don’t think you can equate a shorter sentence with more careless driving. The vast majority of people would be thinking of someone else’s safety rather than a gaol sentence IF THEY WERE THINKING OF ANYTHING AT ALL.
Really silly to assume that people think ‘shall I mow this cyclist down? Yeah why not, 18 months isn’t so bad’
If people don’t take enough care to avoid killing people, they won’t take enough care to avoid any amout of time. Let’s face it – who here has never ever been careless for a second behind the wheel? I consider myself a decent driver and I could list incidents in the past where I scared myself by being careless.
I would go for a lifetime driving ban though.