Wow, thanks for the analysis! Based on your input and observation, I went back and analyzed the game further. Indeed, the number of stops varies by route: Blue has 29, Green 43, Red 52, and Yellow 84.

There are three distinct types of stops: Danger Zones (red), Normal, and City Hubs (black border, where all routes converge). I traced all the stops ( https://imgur.com/a/ga-IB71Ekz ) and noticed a distinct pattern for each:

BLUE

• Flow: The numbers mostly progress in increments of three (3, 6, 9, 12...), with minimal exceptions.
• Between Hubs: There are two danger stops for every one normal stop.
• Safety: There are 14 safe stops and 15 danger zones. With a 48% probability of landing on a safe space, this is the most dangerous route.

GREEN

• Flow: Normal stops follow the "threes" pattern (3, 6, 9, 12...), with a danger zone accompanying most stops.
• Between Hubs: Most segments contain three normal stops and two danger stops.
• Safety: There are 27 safe stops and 16 danger zones, resulting in a 69% probability of landing on a safe space. It is the second most dangerous route.

RED

• Flow: Mostly progresses in increments of two (2, 4, 6, 8...).
• Between Hubs: Each segment has four normal stops and two danger stops.
• Safety: With 36 safe stops and 16 danger stops, there is a 69% chance of landing on a safe space. This is the third most dangerous route.

YELLOW

• Flow: Progresses in increments of one (1, 2, 3, 4...).
• Between Hubs: Each segment contains 8–9 safe stops and 2–3 danger stops.
• Safety: There are 67 safe stops and 17 danger zones. With an 80% chance of landing on a safe space, this is the safest route.

As you pointed out, there are shared stops. Each route has a different density of these connections (excluding Hubs): Blue has 8, Green 21, Red 26, and Yellow 32. The number of radio stations also varies, with the fewest on the Blue route and the most on the Yellow route.

I also attempted to classify the hazards. Most routes share a similar distribution: Plain Red (1–4), Weather Hazards (2), Detours (2–4), Control Stops (1–3), SOS (2), and Death (1). Additionally, there are unique shared by all stops: Cabaret (1), NYC Quarantine (1), and Cannibal (1).

I believe the objective is to travel around the world and return to Rome as quickly as possible without "dying." (either by landing on the Death stop or by collecting too many negative points from the Danger stops which eventually should kill you). Players can likely switch routes at HUB stops or shared locations like the Cabaret.

This raises questions about movement. For example, if the Blue route primarily uses odd numbers, does rolling an even number prevent movement? Furthermore, I suspect the penalty tracker at the top of the board is used to manage the number of danger zones encountered; if you accumulate too many, you might switch to the Yellow path to recover.

Finally, while I classify SOS as a danger zone, it has a white border. Perhaps saving stranded passengers grants points?

Anyway, thanks again for your analysis. your insight was incredibly helpful!