diff --git a/apps/ltn/src/browse.rs b/apps/ltn/src/browse.rs
index c1fb840b40..329ee60f0a 100644
--- a/apps/ltn/src/browse.rs
+++ b/apps/ltn/src/browse.rs
@@ -6,7 +6,7 @@ use map_gui::tools::{ColorNetwork, DrawRoadLabels};
 use widgetry::mapspace::{ToggleZoomed, World, WorldOutcome};
 use widgetry::{
     Choice, Color, DrawBaselayer, EventCtx, GeomBatch, GfxCtx, Key, Line, Outcome, Panel, State,
-    Text, TextExt, Toggle, Widget,
+    TextExt, Toggle, Widget,
 };
 
 use crate::edit::EditMode;
@@ -302,32 +302,17 @@ pub enum Style {
 }
 
 fn impact_widget(ctx: &EventCtx, app: &App) -> Widget {
-    let map_name = app.map.get_name();
-
-    if &app.session.impact.map != map_name {
-        // Starting from scratch
-        return Widget::col(vec![
-            Text::from_multiline(vec![
-                Line("This will take a moment.").small(),
-                Line("The app may freeze while calculating.").small(),
-            ])
-            .into_widget(ctx),
-            ctx.style().btn_outline.text("Calculate").build_def(ctx),
-        ]);
-    }
-
-    if app.session.impact.change_key == app.session.modal_filters.get_change_key() {
+    if &app.session.impact.map == app.map.get_name()
+        && app.session.impact.change_key == app.session.modal_filters.get_change_key()
+    {
         // Nothing to calculate!
         return ctx.style().btn_outline.text("Show impact").build_def(ctx);
     }
 
-    // We'll need to do some pathfinding
     Widget::col(vec![
-        Text::from_multiline(vec![
-            Line("Predicting impact of your proposal may take a moment."),
-            Line("The application may freeze up during that time."),
-        ])
-        .into_widget(ctx),
+        Line("The app may freeze while calculating this.")
+            .small()
+            .into_widget(ctx),
         ctx.style().btn_outline.text("Calculate").build_def(ctx),
     ])
 }
diff --git a/apps/ltn/src/impact/ui.rs b/apps/ltn/src/impact/ui.rs
index 3cec09d150..75252eeeea 100644
--- a/apps/ltn/src/impact/ui.rs
+++ b/apps/ltn/src/impact/ui.rs
@@ -68,17 +68,28 @@ impl ShowResults {
             Line("Impact prediction").small_heading().into_widget(ctx),
             Text::from(Line("This tool starts with a travel demand model, calculates the route every trip takes before and after changes, and displays volumes along roads")).wrap_to_pct(ctx, 20).into_widget(ctx),
             Text::from_all(vec![
-                Line("Red").fg(Color::RED),
-                Line(" roads have increased volume, and "),
-                Line("green").fg(Color::GREEN),
-                Line(" roads have less. Width of the road shows how much baseline traffic it has."),
-            ]).wrap_to_pct(ctx, 20).into_widget(ctx),
-            "Click a road to see changed routes through it.".text_widget(ctx),
+                    Line("Red").fg(Color::RED),
+                    Line(" roads have increased volume, and "),
+                    Line("green").fg(Color::GREEN),
+                    Line(" roads have less. Width of the road shows how much baseline traffic it has."),
+                ]).wrap_to_pct(ctx, 20).into_widget(ctx),
+                Text::from(Line("Click a road to see changed routes through it.")).wrap_to_pct(ctx, 20).into_widget(ctx),
+                Text::from(Line("Results may be wrong for various reasons. Interpret carefully.")).wrap_to_pct(ctx, 20).into_widget(ctx),
             // TODO Dropdown for the scenario, and explain its source/limitations
             app.session.impact.filters.to_panel(ctx, app),
-            app.session.impact.compare_counts.get_panel_widget(ctx).named("compare counts"),
-            ctx.style().btn_outline.text("Save before/after counts to files (JSON)").build_def(ctx),
-            ctx.style().btn_outline.text("Save before/after counts to files (CSV)").build_def(ctx),
+            app.session
+                .impact
+                .compare_counts
+                .get_panel_widget(ctx)
+                .named("compare counts"),
+            ctx.style()
+                .btn_outline
+                .text("Save before/after counts to files (JSON)")
+                .build_def(ctx),
+            ctx.style()
+                .btn_outline
+                .text("Save before/after counts to files (CSV)")
+                .build_def(ctx),
         ]);
         let top_panel = crate::components::TopPanel::panel(ctx, app);
         let left_panel =