Which of the following do you think is the safest way to travel?

Considering the fact that the subject is traveling by bicycle and on foot, long distances, with camping gear and with 4 dogs.
( That’s just the way it is )
What are the pros and cons… especially what do you the benefits / risks for each option are in particular.

Imagine ..

1) coasting along railroads (to keep track of destinations, step by step)

2) avoiding highways, freeways, and all sorts of traffic flow, venturing throughout the woods, mounts and countrysides (farms, wildlands…).

3) cutting through small towns and SOME cities; coasting along (non-isolated) segments of railroads and highways, etc…; venturing through wildlife…

4) other…

P.S.
this is not happening in the U.S. where there could be some risks known to you, it’s happening in Europe let’s say from the south of Italy all the way to Norway.
( check a map if you can’t picture it… it’s quite a long way )

Cheers