diff --git a/src/routes/route_check/jat_check/Form.svelte b/src/routes/route_check/jat_check/Form.svelte
index 1238771e8b..aab58dfcdf 100644
--- a/src/routes/route_check/jat_check/Form.svelte
+++ b/src/routes/route_check/jat_check/Form.svelte
@@ -35,9 +35,9 @@
   bind:value={$state.jat[junctionIdx][stage].movements[idx].score}
 />
 
+<Guidance />
+
 <TextArea
   label="Comments"
   bind:value={$state.jat[junctionIdx][stage].movements[idx].notes}
 />
-
-<Guidance />
diff --git a/src/routes/route_check/jat_check/guidance/Guidance.svelte b/src/routes/route_check/jat_check/guidance/Guidance.svelte
index 45254db2b7..7af0e4ac87 100644
--- a/src/routes/route_check/jat_check/guidance/Guidance.svelte
+++ b/src/routes/route_check/jat_check/guidance/Guidance.svelte
@@ -1,10 +1,10 @@
 <script lang="ts">
   import { Radio, SecondaryButton } from "govuk-svelte";
   import { pairs, Modal } from "$lib";
-  import { guidance, type GuidanceObject } from "./data.ts";
+  import { guidance, type GuidanceObject, type JunctionType } from "./data";
 
-  let junctionTypes: string[] = Object.keys(guidance);
-  let selectedJunctionType: string = junctionTypes[0];
+  let junctionTypes = Object.keys(guidance) as JunctionType[];
+  let selectedJunctionType: JunctionType = junctionTypes[0];
   let movementTypes: string[] = [];
   let selectedMovementType: string = "";
 
@@ -20,12 +20,12 @@
     selectedMovementType,
   );
 
-  function getMovementTypes(junctionType: string): string[] {
+  function getMovementTypes(junctionType: JunctionType): string[] {
     let result = Object.keys(guidance[junctionType]).filter(
       (key) => key !== "summary" && key !== "otherJunctionTypeWhichApplies",
     );
-    let otherJunctionTypeWhichApplies =
-      guidance[junctionType].otherJunctionTypeWhichApplies;
+    let otherJunctionTypeWhichApplies = guidance[junctionType]
+      .otherJunctionTypeWhichApplies as JunctionType | "";
     if (otherJunctionTypeWhichApplies) {
       result = result.concat(
         Object.keys(guidance[otherJunctionTypeWhichApplies]).filter(
@@ -37,7 +37,7 @@
   }
 
   function getGuidanceObject(
-    junctionType: string,
+    junctionType: JunctionType,
     movementType: string,
   ): GuidanceObject {
     if (!movementTypes.includes(movementType)) {
diff --git a/src/routes/route_check/jat_check/guidance/data.ts b/src/routes/route_check/jat_check/guidance/data.ts
index 1f114fc81e..ac188eb7e2 100644
--- a/src/routes/route_check/jat_check/guidance/data.ts
+++ b/src/routes/route_check/jat_check/guidance/data.ts
@@ -1,3 +1,7 @@
+// Copied manually from
+// https://assets.publishing.service.gov.uk/media/5ffa1f96d3bf7f65d9e35825/cycle-infrastructure-design-ltn-1-20.pdf
+// (LTN 1/20) appendix B
+
 export const guidance = {
   "Any type of junction": {
     otherJunctionTypeWhichApplies: "",
@@ -23,6 +27,7 @@ export const guidance = {
       ],
     },
   },
+
   "Simple priority T-junction": {
     otherJunctionTypeWhichApplies: "",
     "Right turn from minor arm": {
@@ -67,7 +72,8 @@ export const guidance = {
       ],
     },
   },
-  "Crossroads": {
+
+  Crossroads: {
     otherJunctionTypeWhichApplies: "Simple priority T-junction",
     "Ahead from minor arm": {
       scoreZero: [
@@ -81,6 +87,7 @@ export const guidance = {
       ],
     },
   },
+
   "Traffic Signals": {
     otherJunctionTypeWhichApplies: "",
     "All movements": {
@@ -108,6 +115,7 @@ export const guidance = {
       ],
     },
   },
+
   Roundabout: {
     otherJunctionTypeWhichApplies: "",
     "All movements": {
@@ -128,6 +136,8 @@ export const guidance = {
   },
 };
 
+export type JunctionType = keyof typeof guidance;
+
 export interface GuidanceObject {
   scoreZero: string[];
   scoreOne: string[];