Market Analysis Market Research Future (MRFR) projects the global tunnel sensor market to reach USD 6,074.8 Million at a CAGR of 6.5% from 2020 to 2027 (forecast period) Need to Reduce the Exposure of Toxic Gases in Road and Rail Tunnels Tunnel construction has increased during the last decade to improve road and rail connectivity. Tunnels are confined spaces that are typically built through...