In light of this, the council will be making modifications to the islands' design. An audit into the work found there was concern that the islands were not 'mountable', with the centre piece having a sheer vertical face of 200mm.
Where possible, mountable traffic islands are designed to allow vehicles to travel over the edges of them. This gives drivers more room for error when driving around them.
This week the council will begin work to reduce the height of the centre pieces by half to 100mm and add sloped edges to ensure they are mountable.
The reaction of residents has been mixed.
Joll Rd resident Peter Egerton said while he was in favour of the modification, he thought the council's efforts would be better spent ensuring the islands were doing their intended job.
"I don't think the islands have worked, because it hasn't slowed the traffic down. As far as I can tell the traffic is as fast as it ever was.
"If they reduced the height and made it mountable, I'd think the temptation would be for people to drive over them. At the moment you can see what's going to happen, so you don't."
Darryl Mitchell - who drives down Joll Rd frequently - had written to the council saying he felt modifications were not enough, as the whole road design was "inherently flawed".
"There is no need to have these islands placed on bends in Joll Rd, and in my opinion should be completely removed. They present a danger and they are more likely [to] cause an accident than excess speed," he wrote.
"[Council's] proposal to mitigate the hazard by lowering and make them mountable is a debatable solution."
Acting Hastings deputy mayor Simon Nixon, who last year said the way the islands were constructed was a "recipe for disaster", said he thought the council was doing the right thing in modifying them.
Although there had been no crashes as a result of the islands, their design meant "a slight mismanagement on a bike, or a car can have some serious damage".
"The council's taking the right approach by looking at it again. They should retain the good features, but get rid of the less desirable parts."
Other recommendations in the report, including trimming back trees and shrubs on some corners and putting in safety fences between the cycle/walkway and the road, have already been completed.
Police were unable to supply information on whether there were any serious crashes on Joll Rd since the islands were installed.