What is the advantage of having the bacterial dna near the center of the cell?

The DNA of the bacteria is present in a circular form which can be housed inside the irregularly shaped nucleoid without membrane. The nucleoid contains other biomolecules like proteins, enzymes and RNA along with DNA.  

The bacterial DNA is present in the center of the cell as its central location enables it to reach the to all parts of the cell which could facilitate the cell functions easily. Since DNA controls all the functions of the nucleus, therefore, it's central location is necessary to the cell.

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.