How far is Dhaka from district, upazila HQs?

Over the last one year we have written several times to the Ministry of Communication, Ministry of Science and Information and Communication Technology, Ministry of LGRD, Ministry of Planning, Department of Roads and Highways to kindly let us know the exact road distances from our capital city to the upazila headquarters and also the roadriver distances from our district to upazila headquarters. Unfortunately, we have not received any response from any quarters. The above information is necessary for millions of people travelling from one place to another. This knowledge is also important for promoting trade, commerce, international and domestic tourism. Would the authorities concerned kindly enlighten us in the interest of the public? O H Kabir Wari, Dhaka