Stage I – total length of Stage I is 42.5 Km. and interchanges are proposed to be constructed at Enderamulla, Gampaha, Veyangoda and Mirigama. The tentative corridor for phase 1 of the expressway has been identified and is proposed to be implemented in three stages as follows: Stage II – total length of Stage II is 35 Km. and interchanges are proposed to be constructed at Pothupitiya, Dampalassa and Pellandeniya.Stage III – total length of Stage III is 44 km. and interchanges are proposed to be constructed at’ Pothupitiya, Polgahawela, Rambukkana and Hedeniya. Construction of phase one of the northern expressway is set to begin with cabinet granting approval to carry out feasibility studies, environmental impact assessments and to prepare documents to invite expressions of interest and requests.The contract for the consultancy services to carry out feasibility studies for the phase 1 of this project is to be awarded to SMEC International pty Ltd, Australia through direct contracting method, the government announced today.