Adapt definition of center line

Author: carsten-kuebler

osi_lane.proto

@@ -54,15 +54,8 @@ message Lane
 
         // The lane's center line (as a list of segments).
         //
-        // This is the line, that a typical vehicle is supposed to follow. Thus, if
-        // the road narrows (e.g. at a construction site) this line is supposed to
-        // describe the trajectory that the vehicle should follow. 
-        // Depending on the size of the vehicle, the vehicle may not be able to 
-        // orient itself directly on the center line due to its dimensions, but 
-        // may have to deviate from it in order to avoid e.g. a collision.
-        // The intended direction of travel on the lane is given by the
-        // direction defined by the sequence of points forming the center line.
-        //
+		// The center line describes the middle of the lane. 
+		//
         // \image html highway_exit.png "Center lines as yellow dotted lines."
         //
         // \attention The points describing the center line might be set at
@@ -72,6 +65,16 @@ message Lane
         // image:
         //
         // \image html line_approximation_error.png "Approximation error as green line."
+        //
+		// \note The center line is the line that a typical vehicle follows more or 
+		// less (depending on the situation, a little more to the left or right of the 
+		// center line). Thus, if the road narrows (e.g. at a construction site) this 
+		// line is supposed to describe the trajectory that the vehicle should follow. 
+        // Depending on the size of the vehicle, the vehicle may not be able to 
+        // orient itself directly on the center line due to its dimensions, but 
+        // may have to deviate from it in order to avoid e.g. a collision.
+        // The intended direction of travel on the lane is given by the
+        // direction defined by the sequence of points forming the center line.
         //
         // \note The \c #centerline is defined only for \c #type =
         // \c #TYPE_DRIVING and one \c #lane_pairing pair.