My work covers 3 NSW highways intersecting at West Wyalong - Newell, Mid Western & Goldfields Way. We get a lot of motor vehicle crashes in this area due to fatigue, driving with poor health, loss of concentration, and occasionally drivers speeding. The drivers leave Melbourne, Adelaide, Sydney & Brisbane and get to around about here, and crash due to the above factors.
About 3 years ago the NSW gubberment reduced the speed on the Newell Hwy to 100 from 110kms/hour. The net result was no crashes for our area but Narrandera area to the South, and Dubbo area to the North, seeing an increase in their motor vehicle crash workload.
Then 2 years ago the gubberment decided they would put the speed limits back to 110kms/hour again in 90% of the Newell Hwy.
The Result -
Narrandera and Dubbo's motor vehicle crash workload dropped off and our workload increase again.
110kms/hr allows drivers on big trips to push further along their journey meaning they get to West Wyalong area before crashing.
Reduction of the speed limit to 100kms meant they only got to Narrandera or Dubbo areas before crashing.
The motor vehicle crash rate didn't reduce with the lowering of the speed limit - It just changed the place where the motor vehicle crash was going to happen