With emergency services vehicles arriving on the scene he then took a detour to get into Whangarei. Another onlooker said speed limits along the stretch of road were confusing for drivers, as were the lane markings.
But Northland Road Policing Manager Inspector Wayne Ewers said he was unsure where such confusion would stem from.
"It's well signposted. If people are paying attention they'll see the signs. Drivers should be driving to the conditions and if there is heavy traffic we encourage people to slow down."
Mr Ewers was not commenting directly on yesterday's crash, the cause of which was still being determined.
The 14-km stretch of road between Whakapara and Kauri had seen three major crashes in 10 days. On November 27, a three car crash outside Croft Poles on State Highway 1 had police imploring drivers to pay attention. The crash, involving six people saw three people hospitalised. Three days before, a crash near Whakapara killed a woman in her 60s, when two cars collided on SH1. The road toll for Northland stands at 19, equalling last year's total total.