diff --git a/TODO.txt b/TODO.txt
index f5e7447..3df36e7 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -60,6 +60,7 @@
 
 =========== BUGS =================
 
+- MAP4: one triangle in top section is missing!
 - very rarely the near plane overflow bug still happens, maybe shift near plane
   a bit further still?
 - sometimes during long loading the screen goes black, seems to have appeared
diff --git a/data b/data
index ae83fae..f0a249b 100644
--- a/data
+++ b/data
@@ -31,79 +31,6 @@ bottom section
 :;41ZJ :fR21   long wall top
 :;91WL :fJ21   long wall top bottom
 :xr1V :fa37
-
-:n31W :f121 :=31X :f123 :=01W :f321           corner top left
-
-diagonal corner top left
-
-:=30U :f413 :=70V :=50T
-:A50S :f131 :A60T :f131
-:A70U :f131 :A80V :f131
-:A41SI :f121 :A51TI :f121
-:A61UI :f121 :A71VI :f121
-:\81WJ| :f121
-
-top section
-
-:\w1ZL :f131 :\x1YI| :f131L
-:nw4Y1L :f121
-:;w1&J :f421 :f151
-:=w3Z2 :^w3@2I- :^w4@2 :=w4&2
-:=w0Y :f514
-:AA0&L :f131 :AB0@L :f131 :AA1@J :f121 :\B1ZJ :f121
-:=w0Y :f141 :m664
-
-small house top
-
-:-J3Y :f411 :<J3ZI :f411 :,K1Z2J :f211     :^J0ZI :f311
-:=M1Z2 :f121 :=J0Y1 :m443 :=I0X2 :=J0Y3
-
-:x514 :f426
-
-:=D06 :fk21 :nD06I :f121 :=D01 :fp21 :nD11I   walls bottom
-
-:=W06 :f12b :=&01 :f12g
-
-top right corners
-
-:AV0ZL :f131 :AW0YL :f131 :AX0XL :f131
-:AY0WL :f131 :AZ0VL :f131 :A@0UL :f131
-:A&0TL :f131 :AV1YJ :f121 :AW1XJ :f121
-:AX1WJ :f121 :AY1VJ :f121 :AZ1UJ :f121
-:A@1TJ :f121 :AS0VJ :f131 :AT0UJ :f131
-:AU0TJ :f131 :AV0SJ :f131 :AW0RJ :f131
-:AT1VL :f121 :AU1UL :f121 :AV1TL :f121
-:AW1SL :f121 :AX1RL :f121
-:=U1Z :f121 :\S1WL :f121
-
-:=X0C2 :f13f :f21f :=&0C2 :f13h :=@0C2 :f11f   right walls
-
-left section
-:=01P :f127 :=41P :f123 :\01O|L :f121 :\41OJ :f121
-:\22L|I :m111 :\42G|I :m111 :\22C|I :m111
-:~31I2 :~11G2
-:=50y :f212 :A00yJ :A50AL :A60zL :A70yL
-
-bowl
-:'60rJ :f117 :^70rL- :f117 :^71rJ :f117 :|72rJ- :f117
-:|82rL :f117 :|81rL- :f117 :'50rL :f117 :m437
-
-details
-
-:;y031J :f311 :;y021L :f311   hole
-
-:^3212L :^3112L- :-2212 :-2112-   arrow
-
-:=410 :f222
-:]X1uL :f118
-:]&1uJ :f118
-
-:>F01 :f316
-:>00D :f513
-
-:=b0W3 :fa14
-
-:'W02L :f114
-
-:=60I2 :f236 :^62IJ :f116 :^73IJ :f116       spectator seats
-:|01z2L :f11e     border left
+#RLC1;00LC1;8bd6e314 0000519:0121:00a3:0041:0069:0041:00d9:0081:0049:0081:0059:0021:00d9:0041:0245:0031:0019:01e1:0023:00e1:0029:00b1:0089:0051:0039:0031:0123:0021:0395:0041:01b3:0031:0073:0041:0033:0051:0033:0121:0043:0031:0073:0031:0053:0031:0103:0031:00d9:0011:0339:0021:0109:0011:00b9:0031
+#BLC1;
+#RLC1;00LC1;8bd6e314 0000519:0011:0149:0051:0159:0071:00a9:0041:00f9:0021:0123:0021:00b9:0088:0040:00b8:001c:0054:0030:0079:0051:0143:0081:0029:0101:00e9:0041:0099:0051:00a9:0041:0335:0031:0189:0041:00a3:00c1:0033:0031:0013:0071:0043:00b1:00a3:0051:0169:0021:0429:0021:00b3:0031
diff --git a/racing.h b/racing.h
index 666172a..65dfe0e 100644
--- a/racing.h
+++ b/racing.h
@@ -76,7 +76,8 @@ typedef int32_t LCR_GameUnit;  ///< abstract game unit
 #define LCR_CAR_STEER_FRICTION ((3 * TPE_F) / 4)
 #define LCR_CAR_ELASTICITY (TPE_F / 64)
 #define LCR_CAR_ACCELERATION (LCR_PHYSICS_UNIT / 9)
-#define LCR_CAR_STEER_SPEED 13      ///< 0 to 16, lower is faster
+#define LCR_CAR_STEER_SPEED 52      ///< 0 to 64, lower is faster
+#define LCR_CAR_STEER_SLOWDOWN 128  ///< slows down steering at higher speeds
 #define LCR_CAR_STEER_MAX (LCR_GAME_UNIT / 2)
 
 #define LCR_CAR_ACCELERATOR_FACTOR 2
@@ -1290,17 +1291,20 @@ uint32_t LCR_racingStep(unsigned int input)
     {
       steering = 2;
 
-      LCR_racing.wheelSteer =
-        LCR_CAR_STEER_MAX -
-          (LCR_CAR_STEER_SPEED * (LCR_CAR_STEER_MAX - LCR_racing.wheelSteer)) / 16;
+      // We slow down steering by 1 for each LCR_CAR_STEER_SLOWDOWN speed.
+      LCR_racing.wheelSteer = LCR_CAR_STEER_MAX -
+        (TPE_min(LCR_CAR_STEER_SPEED + LCR_racingGetCarSpeedUnsigned() /
+         LCR_CAR_STEER_SLOWDOWN,64) * (LCR_CAR_STEER_MAX -
+         LCR_racing.wheelSteer)) / 64;
     }
     else if (input & LCR_RACING_INPUT_LEFT)
     {
       steering = 1;
 
-      LCR_racing.wheelSteer =
-        -1 * LCR_CAR_STEER_MAX +
-          (LCR_CAR_STEER_SPEED * (LCR_racing.wheelSteer + LCR_CAR_STEER_MAX)) / 16;
+      LCR_racing.wheelSteer = -1 * LCR_CAR_STEER_MAX +
+        (TPE_min(LCR_CAR_STEER_SPEED + LCR_racingGetCarSpeedUnsigned() /
+        LCR_CAR_STEER_SLOWDOWN,64) * (LCR_racing.wheelSteer +
+        LCR_CAR_STEER_MAX)) / 64;
     }
 
     if ((LCR_racing.wheelCollisions & 0xcc)) // back wheel on ground?