Road Safety: Treatment of Crash Locations

Question 1

What are treatment of crash locations?

Answer 1

Reactive process, responding to an existing crash problem

Improving the safety of known crash locations?

Question 2

How does a road safety audit differ from treatment of crash locations?

Answer 2

Road safety audit is a proactive process, avoiding future crashes.

Question 3

What is Haddon’s Matrix?

Answer 3

Injury prevention through:

Reduce safety risk - priority for pedestrians
Reduce energy - limit speeds
Reduce potential - Road design, barriers, medians, visibility
Improve emergency response

Question 4

How do we evaluate costs & benefits?

Answer 4

Benefit-cost analysis

Question 5

What is the Present Value (PV) of a single cash flow?

Answer 5

P=F/(1+r)^n

Question 6

What is the PV of an Annuity?

Answer 6

An=((1-(1+r)^-n)/r)*R

Question 7

What is the Benefit Cost Ratio (BCR)?

Answer 7

BCR=(PV Benefits)/(PV Costs)

Question 8

What is the Net Present Value (NPV)?

Answer 8

NPV=PV Benefits-PV Costs