The National Highways Authority of India (NHAI) has initiated preparation of a Detailed Project Report (DPR) to upgrade the Indore–Khalghat–Sendhwa–Maharashtra stretch of National Highway 52 from a four-lane to a six-lane configuration. The proposed upgrade will cover around 160 kilometres and aims to strengthen regional connectivity, improve logistics efficiency and accommodate rising traffic on the Agra–Mumbai corridor. The authority indicated that the DPR work is underway, and construction will be taken up in phases after the report is finalised. National Highway 52 forms a core section of the Agra–Mumbai corridor, linking major economic centres, including Indore and Mumbai and handling heavy cargo movement daily. Nearly 40,000 vehicles use the corridor every day, and the six-lane upgradation is intended to make the route more reliable, safer and time-efficient. Challenging ghat sections such as Bheru Ghat, Bakaner Ghat and Bijasan Ghat are included in the scope for the six-lane upgrade. The authority noted that the previous four-lane works involved road realignment, slope balancing, carriageway widening and several safety interventions that improved traffic management and road safety. Under the proposed six-lane expansion, those improvements are to be further enhanced, and a parallel bridge over the Narmada at Khalghat has been proposed to ease load on the existing structure and ensure seamless six-lane continuity. To address congestion in urban and semi-urban areas, bypasses and service roads will be developed, and flyovers and underpasses are planned at major junctions to separate local and highway traffic. Special emphasis is being placed on permanent solutions for identified accident-prone blackspots, particularly in the Bijasan Ghat area, with measures such as redesigning sharp curves, improving drainage and installing advanced road furniture together with modern traffic management systems. The project is expected to complement National Highway 47 and the proposed Indore Western Bypass and is likely to reduce logistics costs and improve supply chain efficiency for industrial hubs such as the Pithampur area. NHAI projects that the upgraded corridor will reduce travel time between Indore and Mumbai, lower fuel consumption, cut carbon emissions and boost trade, tourism and industry across the region.