diff -r 687d281ad7bb -r 806e938b9566 src/roadveh_cmd.cpp
--- a/src/roadveh_cmd.cpp	Tue Feb 13 23:37:50 2007 +0000
+++ b/src/roadveh_cmd.cpp	Wed Feb 14 00:50:34 2007 +0000
@@ -1485,7 +1485,7 @@
 		}
 
 		/* Set vehicle to second frame on the tile */
-		CLRBIT(v->u.road.state, RVS_DRIVE_SIDE);
+		v->u.road.state = tmp & ~(1 << RVS_DRIVE_SIDE);
 		v->u.road.frame = 1;
 
 		if (newdir != v->direction) {