That perfection came around slightly by accident, with Williams attacking from the peloton with 50 kilometres to go. She says that wasn't exactly by design.
"My plan was to get away solo but I didn't expect it to be such a big gap, or so early.
"I was just testing the legs and trying to put a little hurt on for the girls, but no-one could follow me. I thought I might as well keep going, and rode at a steady pace just in case I got caught – and no-one came.
"I was sitting at [a two minute lead] for a while and there were still four or five laps to go and I was like 'uh oh, am I going to hold it?'"
She not only held the lead, but extended it, with the chasing pack content to let her go, or more likely, unable to reel her back in. That left a race for the other spots on the podium, with Sharlotte Lucas leading home the sprint for silver, and Kirsty McCallum claiming bronze.
McCallum actually crossed the line in fourth, with 20-year-old Grace Anderson pipping her on the line. However, the Under-23 race is contested separately, meaning that Anderson wins the U23 title, while McCallum was given the bronze medal in the elite race.
However, they were all far behind Williams, who will get to wear the New Zealand national jersey all year round for her World Tour team, Mitchelton-Scott.
Much like men's time trial winner Hamish Bond, Williams says she will be on the start line if selected at the Commonwealth Games – a significant move considering most World Tour riders will be unavailable.
"I would love to – I've talked to my team about it already – if selected, they've allowed me to fly home from Europe and race on the Gold Coast. We'll make it work."
After her dominance this week, there's little doubt she'll be on the Gold Coast come April.
The championships conclude tomorrow with the men's 171km road race.
