The government has adopted radars that sense utility lines beneath the ground using Light Detection and Ranging (LiDAR) technology.
LiDAR uses a pulsed laser to measure distance.
What is India doing?
The government has made several policy interventions such as increased threshold for project approval, enhanced inter-ministerial coordination, exit policy and promoting innovative project implementation models like the Hybrid Annuity Model.
In an effort to increase the pace of construction of roads, the government is using technologies such as radar and remote sensing for mapping underground infrastructure like telephone lines to prevent time and cost overruns caused due to manual mapping errors.
About a third of manual groundwork for constructing roads, are rejected for missing infrastructure details such as electricity, phone and sewage lines, leading to delays and cost overruns.
India has an ambitious highways construction goal of 41km per day. The current rate of construction is 22-23km per day.
The government had awarded 9,655km of highways construction contracts till February out of a target of 25,000 km. It has also raised its construction target to 15,000km as against 6,000 km constructed last year. Out of this 6,467km was constructed till February.
How it will help?
With the help of LiDAR technology, the human error will be minimized.
The data collected by such technologies and associated photogrammetry is comprehensive, therefore revisits to site for measurements is not needed.
The system provides designers with a complete picture of the project with accurate point measurements and the ability to locate features that may be inaccessible or missed with other methods such as clearance height of high tension electricity cable.
LiDAR saves time, as the survey time using mobile LiDAR is much shorter than conventional surveys.
Technology allows minimum dependence on manpower, and weather and logistics factors are minimal.
The cost of LiDAR survey is found to be equal to conventional survey.
The output from LiDAR technology is much more comprehensive, complete and reliable which are missing in the conventional technologies, especially ground-based surveying.