Starting tonight and running through this Sunday, the Georgia DOT says that crews will be updating signs on I-75.  The work on the overhead signs will take place at night and will affect portions of the right northbound lanes between mileposts 320 and 333.  The exit ramps along the thirteen miles of interstate highway will still be accessible and will not be affected by the work on the signage.  The work will take place between 8 PM and 6 AM each night.