- District-wise Road Length of National Highway by Road Construction Department in Bihar (2023)
- District-wise Road Length of National Highway by Road Construction Department in Bihar (Upto September, 2022)
- District-wise Road Length of National Highway by Road Construction Department in Bihar (2021)
- District-wise Road Length of National Highway, State Highway, Major Road and Rural Road by Road Construction Department in Bihar (2019-2020)
- District-wise Road Length of National Highway, State Highway, Major Road and Rural Road by Road Construction Department in Bihar (2018-2019)
- District-wise Road Length of National Highway, State Highway, Major Road and Rural Road by Road Construction Department in Bihar (2017-2018)
- District-wise Road Length of National Highway, State Highway, Major District Road and Rural Road by Road Construction Department in Bihar (As on September, 2017)
- District-wise Road Length of National Highway, State Highway, Major Road and Rural Road by Road Construction Department in Bihar (2016-2017)
- District-wise Road Length of National Highway, State Highway and Major Road by Road Construction Department in Bihar (Upto September, 2016)
- District-wise Road Length of National Highway, State Highway, Major Road and Rural Road by Road Construction Department in Bihar (2015-2016)
- District-wise Road Length of National Highway, State Highway and Major District Road in Bihar (As on September, 2015)
- District-wise Road Length of National Highway, State Highway, Major Road and Rural Road by Road Construction Department in Bihar (2014-2015)
- District-wise Road Length of National Highway, State Highway and Major District Road by Road Construction Department in Bihar (As on March 2014)