diff --git a/deno.lock b/deno.lock
index 847748c..9a7fad9 100644
--- a/deno.lock
+++ b/deno.lock
@@ -2,6 +2,10 @@
   "version": "4",
   "specifiers": {
     "jsr:@bearmetal/doodler@0.0.5-c": "0.0.5-c",
+    "jsr:@std/assert@*": "1.0.10",
+    "jsr:@std/assert@^1.0.10": "1.0.10",
+    "jsr:@std/internal@^1.0.5": "1.0.5",
+    "jsr:@std/testing@*": "1.0.8",
     "npm:@deno/vite-plugin@^1.0.4": "1.0.4_vite@6.1.0",
     "npm:@types/node@*": "22.5.4",
     "npm:vite@*": "6.1.0",
@@ -11,6 +15,22 @@
   "jsr": {
     "@bearmetal/doodler@0.0.5-c": {
       "integrity": "34b0db85af1393b1b01622915963a8b33ee923c14b381afe9c771efd3d631cf1"
+    },
+    "@std/assert@1.0.10": {
+      "integrity": "59b5cbac5bd55459a19045d95cc7c2ff787b4f8527c0dd195078ff6f9481fbb3",
+      "dependencies": [
+        "jsr:@std/internal"
+      ]
+    },
+    "@std/internal@1.0.5": {
+      "integrity": "54a546004f769c1ac9e025abd15a76b6671ddc9687e2313b67376125650dc7ba"
+    },
+    "@std/testing@1.0.8": {
+      "integrity": "ceef535808fb7568e91b0f8263599bd29b1c5603ffb0377227f00a8ca9fe42a2",
+      "dependencies": [
+        "jsr:@std/assert@^1.0.10",
+        "jsr:@std/internal"
+      ]
     }
   },
   "npm": {
diff --git a/src/test/angleMathBench.test.ts b/src/test/angleMathBench.test.ts
new file mode 100644
index 0000000..1ccb584
--- /dev/null
+++ b/src/test/angleMathBench.test.ts
@@ -0,0 +1,32 @@
+/// <reference no-default-lib="true" />
+/// <reference lib="esnext" />
+/// <reference lib="dom" />
+/// <reference lib="dom.iterable" />
+/// <reference lib="dom.asynciterable" />
+/// <reference lib="deno.ns" />
+
+import { averageAngles, lerpAngle } from "../math/lerp.ts";
+import { testPerformance } from "./bench.ts";
+
+Deno.test("angle math", () => {
+  console.log("Average angles");
+  testPerformance(
+    () => {
+      const a = Math.random() * Math.PI * 2;
+      const b = Math.random() * Math.PI * 2;
+      const avg = averageAngles(a, b);
+    },
+    10000,
+    60,
+  );
+  console.log("Lerp angles");
+  testPerformance(
+    () => {
+      const a = Math.random() * Math.PI * 2;
+      const b = Math.random() * Math.PI * 2;
+      const avg = lerpAngle(a, b, .5);
+    },
+    10000,
+    60,
+  );
+});
diff --git a/src/train/train.ts b/src/train/train.ts
index d32fa56..57db737 100644
--- a/src/train/train.ts
+++ b/src/train/train.ts
@@ -310,7 +310,7 @@ export class TrainCar extends Debuggable {
         for (const p of ps) {
           doodler.dot(p.pos, { color: "green" });
           doodler.fillText(
-            p.angle.toFixed(1).toString(),
+            p.angle.toFixed(2).toString(),
             p.pos.copy().add(0, 20),
             100,
             {