The Chennai Unified Metropolitan Transport Authority (CUMTA) will conduct a topographic survey of 4.55 km of roads in Chengalpattu to prepare a road-space allocation plan and support traffic-management improvements, according to a document issued by the authority.
The survey will cover three stretches: 1.9 km of State Highway Urban Stretch Six, which passes through Sadras, Chengalpattu, Kancheepuram, Arakkonam and Tiruttani Road; 2.3 km of Chengalpattu Main Road; and 350 metres of PV Kalathur Road. The combined survey length is 4.55 km.
CUMTA said the exercise would record detailed information on existing road conditions and adjoining urban features before designs for traffic-management measures are prepared. The survey will map carriageways, medians, footpaths, cycle tracks, junctions, bus stops, bridges and culverts along the selected stretches.
It will also document the boundaries and entrances of buildings located along the roads. Measuring building access points is intended to help planners understand how road-space changes may affect movement into and out of properties, while providing a more accurate basis for designing improvements.
The authority’s survey will include stormwater drains, manholes, drainage outlets and locations vulnerable to flooding. Streetlights, utility poles, signboards and other roadside features will also be recorded. These details are significant for road planning because changes to carriageways, junctions or footpaths can affect drainage, utility infrastructure and the movement of pedestrians and vehicles.
Survey teams will measure road levels and cross-sections, generally at intervals of 20 metres. Additional measurements will be taken at curves and at locations where ground levels change sharply. The exercise will also extend at least 50 metres along roads that join the selected stretches, CUMTA’s document stated.
The resulting topographic data and drawings will provide the groundwork for detailed engineering designs for proposed traffic-management measures. The survey is therefore positioned as a planning and design exercise rather than an immediate announcement of construction or road widening.
A road-space allocation plan can help authorities assess how limited street space is currently divided between moving traffic, parked vehicles, pedestrians, cyclists, public transport, drainage and roadside access. In Chengalpattu, the detailed mapping of these elements will give CUMTA a consolidated record of conditions across the selected corridors before decisions on improvements are taken.
The survey’s coverage of flood-prone locations and drainage infrastructure also links traffic management with the functioning of the wider street network. Roads that remain usable during heavy rainfall depend not only on carriageway design but also on the condition and connectivity of drains, outlets and other stormwater assets.
CUMTA has not announced a construction timeline or specified the final traffic measures that will be proposed. The next stage will be the completion of the topographic survey and preparation of the road-space allocation plan, followed by detailed engineering designs based on the recorded data.
