After the incident, Mrs Richards set up a petition to introduce driving tests for foreign motorists.
On Tuesday, she presented the petition, with 8600 signatures, to New Zealand First leader Winston Peters outside Parliament. It calls for tourists staying longer than three months to sit a full licence driving test, or at least an online test.
"It was great to be there representing Rhys.
"We need to stop this from happening to other families," she said.
"The girl that killed Rhys, she wrote to us and said if there was a licence test available in New Zealand she would have taken it."
Although it was a traumatic ordeal, she would not stop campaigning, she said.
"We have opened the debate for discussion. If people are here for more than three months, then what is wrong for them having to pay a fee to sit a New Zealand drivers licence. Then it is not going to cost Kiwis anything.
"We want to empower the people coming into our country to drive, to arm them with the tools to keep them safe, as well as us. That is all it is," she said.
The petition was not an attack on Chinese drivers or any other countries' driving, she said.
"It's just about how we can make our roads safer for the tourists who are visiting as well as the Kiwis."
The petition had gone to the select committee, and Mrs Richards said they were waiting to hear when the petition would be heard in Parliament.
To show your support for the cause: click Here.