diff --git a/test/algo/test_cinematics.py b/test/algo/test_cinematics.py
index 0907cc2..2ff5899 100644
--- a/test/algo/test_cinematics.py
+++ b/test/algo/test_cinematics.py
@@ -18,7 +18,7 @@
                       computeSwitchbacks,
                       smoothed_speed_calculation,
                       computeAbsCurv,
-                      computeAbsCurvAnotherPoint,
+#                      computeAbsCurvAnotherPoint,
                       estimate_heading,
                       computeAvgSpeed,
                       computeAvgAscSpeed,
@@ -284,9 +284,9 @@ def testAbsCurv(self):
         self.assertEqual(self.trace1.getObsAnalyticalFeature(BIAF_ABS_CURV, 2), 20)
         self.assertEqual(self.trace1.getObsAnalyticalFeature(BIAF_ABS_CURV, 8), 90)
 
-        self.assertEqual(computeAbsCurvAnotherPoint(self.trace1, 1, 1), 1)
-        self.assertEqual(computeAbsCurvAnotherPoint(self.trace1, 18, 8), 28)
-        self.assertEqual(computeAbsCurvAnotherPoint(self.trace1, 57, 35), 87)
+        #self.assertEqual(computeAbsCurvAnotherPoint(self.trace1, 1, 1), 1)
+        #self.assertEqual(computeAbsCurvAnotherPoint(self.trace1, 18, 8), 28)
+        #self.assertEqual(computeAbsCurvAnotherPoint(self.trace1, 57, 35), 87)
 
             
     def testEstimateHeading(self):
diff --git a/tracklib/algo/cinematics.py b/tracklib/algo/cinematics.py
index 02988bb..94d6fa5 100644
--- a/tracklib/algo/cinematics.py
+++ b/tracklib/algo/cinematics.py
@@ -160,6 +160,7 @@ def computeCurvAbsBetweenTwoPoints(track, id_ini=0, id_fin=None):
     return s
 
 
+'''
 def computeAbsCurvAnotherPoint(track, x, y):
     """Computes the curvilinear abscissa of the projection of a point onto a track"""
     distmin, xproj, yproj, iproj = proj_polyligne(track.getX(), track.getY(), x, y)
@@ -169,7 +170,7 @@ def computeAbsCurvAnotherPoint(track, x, y):
     d = track[iproj].distanceTo(Obs(ENUCoords(xproj, yproj), ObsTime()))
     s = computeCurvAbsBetweenTwoPoints(track, 0, iproj) + d
     return s
-
+'''
 
 def computeNetDeniv(track, id_ini=0, id_fin=None):
     """Computes net denivellation (in meters)"""
diff --git a/tracklib/util/geometry.py b/tracklib/util/geometry.py
index d27976a..39610d2 100644
--- a/tracklib/util/geometry.py
+++ b/tracklib/util/geometry.py
@@ -382,7 +382,12 @@ def detect_side(track, x, y, seuilMemeProj=0.1):
 
         dist, xp, yp = proj_segment([xa, ya, xb, yb], x, y)
 
-        abscurv = tracklib.computeAbsCurvAnotherPoint(track, xp, yp)
+        # abscurv = tracklib.computeAbsCurvAnotherPoint(track, xp, yp)
+        if iproj == 0:
+            abscurv = track.getFirstObs().distanceTo(tracklib.Obs(tracklib.ENUCoords(xp, yp), tracklib.ObsTime()))
+        else:
+            d = track[iproj].distanceTo(tracklib.Obs(tracklib.ENUCoords(xp, yp), tracklib.ObsTime()))
+            abscurv = tracklib.computeCurvAbsBetweenTwoPoints(track, 0, iproj) + d
 
         if pdt > 0:
             SIDES.append((dist, xp, yp, 1, abscurv))