Hello.
I checked your requirement and I tried to look for Road Worrier app in Google Play Store.
But there are several apps that is named "Road Worrier".
If you consider me, let me know correct link.
Relevant Skills and Experience
GIS(Geographical Information System), Cartography, Geospatial, Google Maps API, Geolocation, iOS, Android, Web, PHP, Java, C#.
I have expertise for the routing and rich experience on that.
Proposed Milestones
$250 USD - Implementation
We can discuss more details over chat.