Public transportation
The transportation of pets in local transportation varies depending on the destination. Especially in many large cities, pets are often not allowed to be transported loose or without a muzzle.
Trai
In local trains, pets usually travel without an additional fee, just like in Finland. However, it is often required that the pet remains in a carrier throughout the journey.
For long-distance trains, a separate pet ticket can often be purchased along with the owner's ticket.
Taxi
When ordering a taxi, it is good to inform the driver about the accompanying pet - not all cars accept pets.
In many travel destinations, it is easier to hail a taxi from the street, allowing you to discuss the pet with the driver.
Often, small pets are allowed in a carrier, but it may be more difficult to get a ride with larger dogs.
Bus, subway, tram
In many countries, small dogs and cats are allowed to travel in these means of transportation in a carrier, but not freely (even tho there are dogs are seen in the public transportation unleshed).
In many countries, instead of a carrier, a muzzle is used when traveling on public transportation (or in public places) with a dog - based on personal experience, this is not heavily enforced, but dogs often have a muzzle hanging around their neck like a collar.
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In long-distance buses, pets can often be transported in a transport crate in the bus's cargo hold, but they are rarely allowed in the passenger area.
In some destinations, the number of pets is also limited so that only one pet per person is allowed to enter the public transportation.