NHAI deploys CORS technology to fast-track Ernakulam bypass project

Kochi: National Highways Authority of India (NHAI) is set to redefine infrastructure surveying in Kerala by introducing Continuously Operating Reference Stations (CORS) technology for Kochi New Bypass project, linking Karayamparambu in Angamaly to Aroor."CORS technology offers significant advantages over the traditional total station method. Besides the advantages of high accuracy level and reduced labour, this method saves much time," a senior NHAI official said. The technological leap aims to drastically reduce the timeline for completing the survey procedures and the land acquisition process well within the one-year deadline. The 44.7-km Angamaly-Kundannoor greenfield bypass project hit a major roadblock in late 2025 due to the expiration of the land acquisition notification (3A). The 3A notification expired because the 3D notification was not issued by the deadline of Aug 29, 2025. This was triggered by delays in completing the land survey, with only 160 acres surveyed out of the required 750 acres. "The technology allows for rapid data collection. The surveys that previously took months can now be completed in weeks," the official added. According to officials, the initiative is critical as the project scope is set to be further enhanced. A 2025 traffic study indicated higher traffic than the original 2018 survey projected, requiring a redesign to prevent immediate congestion upon opening. NHAI is mulling extending the bypass further south. Instead of terminating at the crowded Nettoor junction, it will now end at Aroor. This increases the total length of the project from 44.7-km to approximately 50km. The extension is intended to link the bypass directly to Aroor-Thuravoor elevated highway under construction. Also, now an eight-lane highway is being planned instead of the original six-lane corridor. "Traditional land surveys often grapple with human error and time-consuming manual measurements. By leveraging CORS, a network of permanent GNSS (Global Navigation Satellite System) receivers, NHAI can now achieve centimetre-level accuracy in real time. This technology eliminates the need for establishing temporary base stations, allowing surveyors to map the additional land required and extension stretches with unprecedented speed," the official pointed out. NHAI also decided to use the CORS technology in other projects being implemented in the state, including development of NH 744 (Kollam-Shenkottai), NH 966 (Palakkad-Malappuram-Kozhikode) and Thiruvananthapuram outer ring road. However, a drawback is that since the technology is satellite-based, there will be visibility issues because of tall trees. "It may require tree cutting measures in that case," the official added. Since the previous notification lapsed in Aug 2025 and the project scope has changed, a fresh 3A notification is mandatory, which is expected soon. Recently, ministry of road transport and highways termed the project as being at the "pre-alignment approval stage".