Research on the noticeable effects of the adverts placed inside the public transportation vehicles was done (in the public transportation vehicles and at the bus stops) it was based upon the accidental sample principle, and it showed the following:

• More than 80 % interviewed citizens have seen the adverts in the public transportation vehicles
• 67% of citizens use public transportation regularly, on the daily basis. 33% of citizens use it two to three times a week.
• In the afternoon hours, the public transportation adverts are being seen by 86% of the interviewed while the percentage is significantly lower in the morning (75%).
• There are no significant differences in how noticeable the adverts placed in different vehicles, buses, trams and trolley buses are.
• How noticeable an indoors advert shall be, depends mostly on age and profession of the interviewed. Adverts are mostly being seen and noticed by citizens who are 19 to 31 years old.
• Younger than 18 follow this group, and at the end the age group from 31 do 45, and they are followed by other age groups.

Advertising posters are being noticed mostly by employees with secondary and high school, then students and housewives.

This way of advertising has been positively evaluated because the indoors adverts give people many useful information, they kill monotony and vehicles look nicer.