The capital of Azerbaijan, contrary to what one might think, has a valid and efficient underground network. Among the positive notes, of course, the prices: only walking on foot costs less!
The bike is not a very popular vehicle. There are no cycle paths and roads, and the Azerbaijani’s reckless driving is a real danger for cyclists.
The really sore point is the total lack of accessible stations for the disabled. There are no elevators at the metro stations. The buses, on the other hand, are fairly dated and have no low floor.
Here are the main info for getting around Baku.

METRO

The network develops according to a typically Soviet model, with richly decorated stations, with numerous objects and national references.
Fast and efficient, the Metro runs every day, from Monday to Sunday, from around 06:00 to midnight. Trains travel with an average frequency of 5/10 minutes. At peak times, there is almost a train every 2/3 minutes!
The Metro is ultimately the best solution for getting around Baku.
In service there are 3 lines, which, for the most part, share the same route.
The Red line and the Green line, the oldest, date back to 1967 and 1976. The Purple line, the last to be inaugurated (2016) is just 2.1 km long
Center and suburbs are perfectly connected thanks to the Metro.

Trains and stations, especially at peak times, are particularly crowded. Often you will be bumped, and pushed, to enter or leave the trains. Women and the elderly often have the priority to sit. Expect, moreover, frequent checks with metal detectors inside the stations.

BUS

Bus, Minibus and Marshrutka are not the best for getting around Baku. As cheap as the metro, they connect the whole city in a capillary way. Being able to extricate oneself from use is a very unlikely undertaking. Traffic is also another negative point to consider. The gender, before each vehicle is indicated the terminus.
In our opinion, to move around the city it is better to rely on the subway.