Your suggestion is correct to the point that a circular motor way is needed in Dhaka. When the flyovers are being constructed, there is an ongoing delayed process of building the 23km expressway. I am not sure if this can be extended to make a loop and connected with all the flyovers. So, there will be a crisscross of motorways. However, the gridlock will continue because there are almost no parallel bypasses a little away from the main existing roads. The bypasses must be connected at an angle with the existing roads to diversify the traffic. I think, Dhaka traffic jam will continue until when the Dhaka Metro rail starts operating.