diff --git a/src/repositoryDataLoader.ts b/src/repositoryDataLoader.ts
index ff949a9..2caa4c2 100644
--- a/src/repositoryDataLoader.ts
+++ b/src/repositoryDataLoader.ts
@@ -8,6 +8,17 @@ const baseUrl = "https://passiogo.com/mapGetData.php";
 // Have one repository data loader running for each supported system
 // Each data loader independently updates data based on frequency of usage
 
+// TODO implement reloading of data
+// Notes on this: we only need to reload ETA data frequently
+// Other data can be reloaded periodically
+// Detailed list:
+// - ETA: reload frequently or switch to write-through approach
+// - Shuttles: reload every minute
+// - Routes: reload every few minutes
+// - Stops: reload every few minutes
+// - OrderedStops: reload every few minutes
+// - Systems: reload once a day
+
 export class RepositoryDataLoader {
   private shouldBeRunning: boolean = false;