To enhance access to Kempegowda International Airport (KIA) from various entry points, Bangalore International Airport Ltd (BIAL) will construct two four-lane flyovers and at-grade roads (on the same level) connecting Ballari Road (NH44) to the airport terminal. The construction will come up at the roundabout closest to the trumpet interchange on NH44.
It will also build two new road over-bridges (ROBs) above the railway line and NH44 at the interchange and widen two vehicular underpasses on the flyover loop roads as part of the project to improve access to the airport. The total length of the flyovers and road over-bridges will be 210 metres. BIAL has floated tenders for the work.
The roundabout at which the flyovers will be constructed and median for the entire stretch, including the flyovers and ROBs, will be demolished and redeveloped. The ROBs will be built near the trumpet interchange over the Bangalore-Jolarpet line.
BIAL will make alternative roads available to minimise the impact of infrastructure work on traffic in the area. A document published by BIAL said the construction of the flyovers and ROBs should not cause any disturbance to traffic flow or halt vehicles heading to the airport from the trumpet interchange and vice-versa. Companies participating in the bids would also have to ensure that there is no interruption to traffic in “vehicular underpasses, on the national highway (main road, service road and toll plaza operations) and at all time ensure traffic safety for road users, pedestrians, staff at toll plaza and residents of areas near the BIAL boundary. All traffic safety measures like barricading, road signage, pavement markings, object markings, deployment of traffic marshals as required, maintenance of roads etc., will be part of the scope of work of this tender,” the document said.
Manmade water bodies In order to minimise the environmental impact of the planned airport expansion, BIAL plans to install rainwater harvesting tanks (RWHTs) — large areas of manmade water bodies on the premises. However, these tanks could attract birds, increasing the bird-strike threat to aircraft operating from the airport. In order to reduce the potential hazard, authorities will use hollow, floating balls to cover the tanks. A total of 23 bird species are found around the airport, BIAL officials said.
BIAL conducted a bird hazard risk assessment at KIAB in relation to the implementation of rainwater harvesting tanks and found that the large manmade water bodies need to be designed and managed so as not to create a suitable environment for the increased presence of birds, said a request for quotation document published by BIAL. If this is not done, then it could create an attractive path for birds between lakes surrounding the airport and the rainwater harvesting tanks, it noted.
Birds using these paths would then be crossing the approach/departure route of aircraft and would pose a hazard to KIAB’s operations. “Consequently, it is essential for KIAB to understand the potential bird strike risk and to identify control measures to avoid any increase in the bird strike hazard,” the document said.
“In view of above, it is decided to use hollow floating balls as a control measure option to prevent the bird hazard.”