New Zealand Transport Agency senior network manager John Jarvis said 70kmh speed limit signs were installed on Wednesday at the approaches to the Blue Pools, 75m back from where drivers would pull off to the car park.
He said the travelling public had raised concerns about the site which NZTA had taken seriously.
"We thank the people who have contacted us with their concerns, given the increasing popularity of this site," he said.
"The site has been assessed and the change agreed to," Mr Jarvis said.
A pedestrian sign was installed before Christmas. Wanaka Doc senior ranger Annette Grieve said the Blue Pools was one of its key "hot spots" and this week a roaming compliance manager had been based at the Blue Pools checking commercial operator permits, counting visitor numbers and conducting visitor surveys.
She said for five days a week during the next four months the roaming compliance ranger would visit the Blue Pools and other Doc hot spots, such as Raspberry Creek, Diamond Lake and Roys Peak.
Ms Grieves said in addition to the roaming ranger, Doc had deployed extra amenities rangers to maintain toilets daily along Mt Aspiring Rd to the Matukituki Valley and the Haast Pass Highway.
They would also be checking on freedom campers, but focusing more on education. The new toilet to be installed near the summit of Roys Peak had been designed and Doc was "just seeking a contractor to have that built", she said.
The number of hikers walking the 16km return, five to six-hour Roys Peak track has grown exponentially since it was promoted on social media sites two years ago.
Ms Grieves said the monthly tally for the number of walkers on the Roys Peak track for the month of December had yet to be calculated but the annual figure between November 2016 and 2017 was 64,000.
That period included the two months the track was closed for lambing and the redevelopment of the car park.
