Wanganui District Council had been approached about a footpath, but had funding issues, Mrs Reweti said.
Constable Sumita Rhodes said police considered a crash was a high possibility and so she prepared a report and approached Downer for help.
Wanganui/Rangitikei Downer manager Chris Edsall said the report was particularly good - "That's what really swayed us."
The company has committed to putting in 300 metres of footpath from the kohanga reo car park in Hinau St to Raupo St and up Raupo St to Puriri St.
The total cost will be $30,000 and the first 100m-plus is already down with the rest due to be finished by May.
Downer had about 100 staff working from its Wanganui office and it wanted to give something back, Mr Edsall said.
"It's about putting some money back into the community, especially for the safety of children."