fix: accept inferred road widths in workbench

scripts/test-road-workbench.js

@@ -0,0 +1,10 @@
+#!/usr/bin/env node
+"use strict";
+
+const assert = require("assert");
+const fs = require("fs");
+const path = require("path");
+
+const html = fs.readFileSync(path.join(__dirname, "workbench", "index.html"), "utf8");
+assert.match(html, /id="width" type="number" min="1" step="0\.01"/);
+console.log("road workbench tests passed");