To be honest, while it's nice and all to save a life (yay!) holding up everyone else trying to get across the river for that length of time adds up.
Most of us get about 700,000 hours (about 80 years) on average to live, when you hold up a city with a few million people in it by blocking traffic (not to mention the other effects of causing others waiting on people stuck in traffic (shipping companies, etc), it only takes a little bit to add up quick.
If it takes 500000 people 30 minutes extra to get where they're going or do what their doing because of it, quick maths will give you that you've just wasted 250000 hours of those people, or 28 years worth of the rest of the population collectively.
Need to work on a bit of a change on how these cases are handled. Brisbane isn't a small town any more, needs to grow up.