Each weekday over 42,000 cars cross Lake Pontchartrain on the longest bridge in the world, The Lake Pontchartrain Causeway. The five-member GNOEC is the controlling body of the Causeway which includes the bridge system and the Causeway Approach road system on the North Shore of Lake Pontchartrain. Please Click Here Fog Season - Please Read LA Disaster Evacuation Guide Right-Of-Way Improvements App. Credit Cards Forms? - Click Here Sign Up For Our Traffic Advisor Due to the Corps levee enhancing project, some traffic delays can be anticipated.  The GNOEC has requested the contractor to provide these daily descriptions of upcoming work.