WA's transport minister says it's not surprising Perth's transport network has been ranked one of the worst globally for sustainability and effectiveness, blaming the former Barnett-government's inaction for the unenviable title.

Perth's transport network was ranked 87th out of 100 cities globally, and fared the worst out of the five Australian cities featured in the 2017 Sustainable Cities Mobility Index by Arcadis.

Perth's transport network has been ranked on of the worst globally in a recent report.

Of the top ten cities featured in the report, seven were European cities.

Hong Kong, Zurich and Paris topped the mobility index, while across the rest of Australia, Brisbane was ranked 48th, Sydney 51st, Canberra 53rd and Melbourne 55th.