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Rajagiriya Flyover

Rajagiriya Flyover

Rajagiriya

The quality of the environment in urban areas is of vital importance. It is one of the main factors that determine whether a city is a healthy place to live, whether we enjoy living there, and whether we want our children to grow up there. One of the key issues affecting the quality of the environment and the quality of life in our towns and cities is road traffic. Heavy motor traffic means poor air quality, unacceptable levels of noise and a weakened sense of neighbourhood and local community. Traffic also gives rise to high costs for the economy through delays caused by congestion.

Rajagiriya is identified to be one of the heavy-traffic areas in the suburbs of the City of Colombo. Rajagiriya Intersection at Welikada Rajagiriya is situated on the important traffic carrying road corridors between Colombo and Sri Jayawardhanapura Kotte, the administrative capital and recently developed high density residential land use at Malabe, Athurugiriya etc. Also the commercial attraction to the office complexes at Battaramulla area has demanded more traffic between Colombo and Battaramulla area since in the recent past.

The main road of Sri Jayawardenapura Mawatha at and near the Rajagiriya Intersection carries over 60,000 to 78,000 Average Daily Traffic (ADT) at Colombo approach and Battaramulla approach respectively in a weekday (as per the survey data). The peak hour traffic at these approaches to the main intersection carries two way traffic of 5,000 to 5,500 per hour in the morning peak and 5,000 to 7,000 in the evening peak respectively. The average intersection traffic at Welikada Plaza Intersection including all the turning movements is around 107,000 as per the traffic surveys carried out in September 2015, which is a significant impact to the traffic congesting at the main intersection. The main intersection is associated with many other junctions and traffic movements which made the entire Rajagiriya Junction a very complicated node for traffic management concerns.

Comprehensive studies underwent, revealed that the congestion is mainly due to the conflicting (cross traffic) movements, specially the right turn movements at major junctions as well as at the center median openings for giving access to the connector roads to the main roads. While the present road capacities were considerably adequate for the demand at present, it was identified that it is the junctions or the intersections that need capacity improvements with restrictions to conflicting movements to the main corridor.

It was then proposed to construct a flyover across the three intersections those are closely laid out at the Welikada Plaza intersection to carry daily commuters amassed at 4+800 km near Victoria Home up and over the flyover to be connected to the Sri Jayawardenapura Mawatha at 5+570km close to Buthgamuwa Road Junction near Fuel Filling Station.

Access Engineering PLC, being recognized in the as a pioneer in the construction of flyovers, was awarded with the project in mid 2016 by in the industry was awarded with the construction of Rajagiriya flyover in mid 2016. The project was an initiative to by the Road development authority under the Ministry of Higher Education and Highways. The project was funded by the Government of Spain. The design and supply of the superstructure are entrusted to Centurion S.A of Spain. Project Management Division II of the company led the project and Mr. Jeewaka Dahanayake was the Project Manager for the said project.

The flyover of 363m length that accommodates four traffic lanes was built on two individual decks where width of a lane shall be 3.5m. It was built following the horizontal alignment of the existing Sri Jayawardenapura Mawatha with two horizontal curvatures of 257m and 128.5m in radius respectively and a vertical alignment with a minimum 5.2m vertical clearance for traffic flow underneath the flyover structure.

Location of the project being one of the most transit areas of the city, a comprehensive traffic management plan was laid by the Engineering Team at PMD II to ensure smooth transition of traffic on site. Further with the exceptional commitment and contribution of the team, the project was able to reach successful completion 12 months ahead of the schedule whilst the contractual completion of the flyover was targeted towards the end of 2018.

According to the latest traffic surveys conducted in April 2018, the intersection handle over 176,000 vehicles per day which is a 62% increment from the number of vehicles passed through the intersection in 2016. Beside the increased number of vehicles, the traffic towards Colombo Borella has speeded up sharply at morning hours to a maximum speed of 8.2km/h from 3.9km/h by saving 39min of travel time from that of 2016 upon the commissioning of the flyover. And also during the off-peak hours the travel time has reduced to 10min from 18min compared with 2016.

The traffic situation will completely be eased with better control of the number of vehicles on the road and the proposed Bus Rapid Transport (BRT) system is installed under the Megapolis Transport Plan.

rajagiriya

Access Engineering PLC, being recognized in the as a pioneer in the construction of flyovers, was awarded with the project in mid 2016 by in the industry was awarded with the construction of Rajagiriya flyover in mid 2016. The project was an initiative to by the Road development authority under the Ministry of Higher Education and Highways. The project was funded by the Government of Spain. The design and supply of the superstructure are entrusted to Centurion S.A of Spain. Project Management Division II of the company led the project and Mr. Jeewaka Dahanayake was the Project Manager for the said project.

A flyover of 363m length that accommodates four traffic lanes was built on two individual decks where width of a lane shall be 3.5m. It was built following the horizontal alignment of the existing Sri Jayawardenapura Mawatha with two horizontal curvatures of 257m and 128.5m in radius respectively and a vertical alignment with a minimum 5.2m vertical clearance for traffic flow underneath the flyover structure.

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