In the year 1948 by decision of the National Board of the municipality of Split, number 4689/48 from March 13, 1948, established was the transport company “Promet” which had the task of organizing city and suburban transport.. With modest transport capacities, consisting of 12 worn out buses and a few trucks, "Promet" started to carry out transport, but because of frequent breakdowns, it occasionally stopped And in addition, the regular seasonal line has been maintained for Dubrovnik along a main road. The total length of the transport line amounted to 58 km, 235,400 km was travelled and 823,420 passengers were transported.

Intensive development starts in 1953. 10 old, but generally repaired “Londoners” was acquired.  The garage space was moved to today's location of hotel "Marjan" where there were old former horse stables and the ground floor of a building adapted for the accommodation of workshop spaces and offices.

In 1958, “Promet” has 44 buses with 2614 passenger seats, and the transport line was 523 km, 2.007.541 km was travelled and 8.543.831 passengers were transported.  There were 244 workers.

In the same year, “Promet” was awarded today's location in the suburbs, where in 1962 a building was build for the purposes of servicing vehicles, and in 1964 the workshop space and offices for the needs of professional and administrative services. That year transport was organized on the island of Šolta and a trolleybus was introduced on the relation of the city coast to Solin. Due to frequent interruptions because of the inexperience of driving personnel as well as the poor state of the roads in the Solin area, the trolleybus transport was terminated in 1968.

In October 1965, “Promet” was joined with the company “Iskra” from Supetar, so “Promet” took over complete road transport on the island of Brač. In 1966 it introduced is transport network to the island of Hvar, and with one line it connected Hvar with the mainland.

In 1968, “Promet” had 133 vehicles and had 701 employees.

The length of the line amounted to 2069 km, and the seasonal line was 835 km. 7,959,806 km was travelled and 30,246,085 passengers were transported.

The fleet in 1978 had a total of 197 vehicles with 17,954 passenger places. 12,250,753 km was travelled and 43,134,493 passengers were transported.

In 1979 a new facility was built which included the Transport Office, the Station for technical inspections of vehicles and a fixed UKV repeater. The first international sport event MISS ' 79, was held in Split. “Promet”, on that occasion, as the official carrier, received from SO Split 25 solo city and 5 joint MAN bus brands.

The City of Split in 1981 was the host to the European Championship in water polo PEP '81 and “Promet” successfully participated in the organization of athletes, sport workers, journalists...

At the XIV Winter Olympics in Sarajevo, as well as the University Games in 1987 in Zagreb, “Promet” successfully participated in the organization of transport of participants and guests of the games.

During 1986, RJ on the island of Brač became independent as RO “Bračtrans”.

The new zonal tariff system that divided the network of lines to 5 zones was introduced on August 30 1987, so a technological excess of workers appeared. For this purpose, a study was made on the validity of the formation of the Traffic Sector in rest where an area would open for the employment of the existing surplus of workers in the company.

In 1988, the fleet consisted of a total of 206 vehicles, 13,014,573 km was travelled and 67,926,556 passengers were transported. On December 31, 1988, 1225 workers were employed.

In 1990, Split was the organizer of the European Championship in athletics PEA ' 90. 10 new joint buses brand MAN and 8 solo suburban vehicles brand TAM were acquired for the occasion. “Promet” with all 18 buses and 60 bus drivers seamlessly organized the transport of athletes, accredited journalists and other guests during the championship, for which it received compliments from the representatives of all state participants and from the Organization Committee. That same year, the Assembly of the Municipality of Split, in accordance with the Enterprise Act, brought a resolution on the organization of the public company “Promet”, Split. Three tow trucks were acquired for the transfer of improperly parked vehicles and with the decision of IV SO Split, we were granted the organization of open public parking in the immediate centre of the city. Outside of communal activities, an agency was opened for the tourist and intercity transport of passengers.

Since 1991, the employees of “Promet” actively participated in the Homeland War and drove the Croatian Army to all fronts of our beautiful country. In spite of the adversities of war, traffic on city lines functioned without any problems.

In 1996, the process for coordinating the organization of the company with the Enterprise Act and the Communal Economy Act was finished, and on October 30, the Contract was signed on the organization and reshaping of the communal company “Promet” - Split to a company of limited liability for performing communal activities of transporting passengers in public transport. The owners of the Company are the City of Split with 65.04%, City of Solin with 5%, City of Kaštela with 9.46%, City of Trogir with 4.26%, City of Omiš with 5.07%, and the Kaštelanska Zagora municipality with 1.01%, Klis with 2.41%, Marina with 1.43%, Muć with 1.48%, Podstrana with 1.70%, Seget with 1.50%, Šolta with 0.47% and Šestanovac with 1.17% share in the basic capital of the company. The structure of the Company was established in two separate traffic-economic centres, which was City Transport for the area of the City of Split and Suburban Transport for the remaining areas.

The fleet in 1997 consisted of 173 buses, of which 80 were joint and 93 were solo vehicles. The highest represented brand is Mercedes with 42 joint and 13 solo vehicles.

In December 1998, the Company had 178 vehicles and 795 employees, of which 55 were employed for a defined period of time, and this information shows the level of rationalization achieved in the Company in the period of the last few years. Based on information for November 1998, it is foreseen that 39,000,000 passengers will be transported and 9,800,000 km will be travelled.

The Holy Father was accommodated by Split on October 4, 1998. The organization of the public transport of pilgrims, high state, county and city officials, church officials, accredited journalists was performed seamlessly by “Promet”:  On that occasion, 150 buses and 260 drivers and other traffic personnel were engaged. It can be said that it was the most demanding project for “Promet” and it received numerous compliments for performing it. The very next day, on October 5, the timetable for the city and suburban lines was held without any difficulty.