Researching Paris, France

Compare the actual trips, including one disruption

Use Île-de-France Mobilités to compare one address inside Paris with a regional option near an RER or train station. Keep destination, arrival time and day type fixed. Include the walk and the transfer, then try a backup route that avoids your main interchange. Check a late return separately. A station on a network diagram cannot tell you whether the connection works for your timetable.

Keep the municipal and regional views distinct

The City of Paris publishes open data on subjects including housing, environment and mobility. Use it to investigate the city side of the comparison and read each dataset’s scope. A regional transport service can cover addresses beyond a municipal dataset. Keep municipality and region fields beside both candidates, and compare room size and included charges before using a rent difference.

Use Les Halles as a specific site

The Paris Air page points to a monitoring site at Les Halles. Check its metadata and the pollutants and periods shown. Name Les Halles when citing a reading. Use Paris housing data for an appropriate address or area, and France’s national measures only for wider context. Where coverage ends, write the check you still need beside the relevant address.

• Regional transport and itinerary help

• City of Paris open data (in French)

• Paris air conditions and station links

• Paris housing and living costs

• France’s national statistics