When you say "dangerous to the public and the people" is this an expert opinion or a personal viewpoint? Road safety is a matter for the Police and the experts at your local highway authority, who would have been consulted during the process. Did the consultation show that 67% of all residents were in favour, or only 67% of those who responded?
It seems odd that the council has consulted the residents and, seemingly, ignored the response, however they are entitled to do this. The parish council would have virtually no say on this matter, so I can understand why they do not wish to engage in ongoing discussions.
The agenda item for the council committee that approved the new scheme would have been accommpanied by an officer's report to inform the members, which will be available on the council's website. This will explain in detail their reasons for adopting the chosen solution and include the many different responses they received during their consultations. Whilst it might not be the outcome you were seeking, hopefully this will help you to understand how they came to their decision.