North Dakota’s 100-Foot Signal Rule Just Got Bigger: What Every Driver Needs to Know After Porteus

On May 22, 2026, the North Dakota Supreme Court decided Porteus v. NDDOT and expanded the reach of the state's 100-foot turn signal rule. Stopping at a stop sign no longer resets the clock — drivers must signal continuously for 100 feet before every turn. Here is what the decision means for ordinary drivers, defense attorneys, and possible future constitutional challenges.