Because you need to go around or go clime up the mountains
They use canals to travel
People have similar transportation in Lazio Italy just like in other places. There are cars planes, as well as trains.
About 3 hours.
That is a little difficult. As it relates to WW2 and 1930's, Spain, Italy and Germany were fascists countries (with Nazism being a form of fascism).
Italy exports to Germany, Spain, France, Belgium, Netherlands and China. The goods that Italy exports include metal, textiles, mechanical products, transportation equipment, textiles and apparel.
Cheapest and Quickest, is by train.
North of Italy there are central Europe (Switzerland and southern Germany) and northern Europe (northern Germany, Denmark, Sweden and Norway. To travel to the rest of Europe you need to cross the Alps.
Germany, Italy, and Japan
Italy's mountainous terrain, especially in the north, can make travel and transportation of goods challenging. Additionally, Italy's long peninsula shape with many coastlines can lead to fragmented regions with limited connectivity, impacting the flow of trade. Additionally, Italy's location in the Mediterranean Sea can subject it to piracy and other security concerns that can disrupt trade routes.
Germany and Italy
If we note that Budapest is in Hungary (not Germany), the driving time from Budapest, Hungary to Rome, Italy is around 12 hours. As it is entirely within the Schengen Area, there are no border crossings.
trains, boats ,steam powered carriages, and bikes were very popular in the 1800s.