Analysts say the new firms may be able to get contracts that are now going to medium sector businesses.
The cabinet of minister had approved the setting up the three companies under the Road Development Authority following a proposal of President Mahinda Rajapaksa in his capacity as minister of ports and highways, the information office said.
Maga Neguma Construction Equipment Company (Pvt) Limited will rent construction equipment for road building project and also bid for contracts below 100 million rupees.
Maga Neguma Emulsion Production Company (Pvt) Limited, will manufacture emulsion, pre-mix and supply them for road sector projects.
Maga Neguma Consultancy and Management Company (Pvt) Limited will provide consultancy services, prepare bills of quantities and project proposals.
Sri Lanka already has a state central engineering consultancy bureau and engineering construction firms that can handle larger contracts.