diff --git a/game/src/debug/mod.rs b/game/src/debug/mod.rs
index 9c94761f5f..8aa5ee04c8 100644
--- a/game/src/debug/mod.rs
+++ b/game/src/debug/mod.rs
@@ -23,6 +23,7 @@ mod objects;
 pub mod path_counter;
 mod polygons;
 pub mod shared_row;
+pub mod streetmix;
 
 pub struct DebugMode {
     panel: Panel,
diff --git a/game/src/debug/shared_row.rs b/game/src/debug/shared_row.rs
index 24a0d1b34e..4a59f128f0 100644
--- a/game/src/debug/shared_row.rs
+++ b/game/src/debug/shared_row.rs
@@ -3,7 +3,7 @@ use geojson::{Feature, FeatureCollection, GeoJson, Geometry, Value};
 
 use map_model::{Direction, Lane, LaneType, Map, RoadID};
 
-// Exports to https://github.com/d-wasserman/shared-row/, returns the filename
+/// Exports to https://github.com/d-wasserman/shared-row/, returns the filename
 pub fn export(roads: Vec<RoadID>, map: &Map) -> String {
     let path = format!(
         "shared_row_export_{}.json",
diff --git a/game/src/debug/streetmix.rs b/game/src/debug/streetmix.rs
new file mode 100644
index 0000000000..2a58a31868
--- /dev/null
+++ b/game/src/debug/streetmix.rs
@@ -0,0 +1,63 @@
+use map_model::{Direction, Lane, LaneType, Map, RoadID};
+
+/// Exports a single road to Streetmix's format, returns the filename
+pub fn export(r: RoadID, map: &Map) -> String {
+    let path = format!("streetmix_export_{}.json", r.0);
+    let street = road(r, map);
+    abstutil::write_json(path.clone(), &street);
+    path
+}
+
+fn road(id: RoadID, map: &Map) -> serde_json::Map<String, serde_json::value::Value> {
+    let r = map.get_r(id);
+    let mut street = serde_json::Map::new();
+    street.insert("schemaVersion".to_string(), 24.into());
+    // TODO Many more fields
+
+    let mut segments = Vec::new();
+    for (l, dir, _) in r.lanes_ltr() {
+        segments.push(serde_json::value::Value::Object(lane(map.get_l(l), dir)));
+    }
+    street.insert(
+        "segments".to_string(),
+        serde_json::value::Value::Array(segments),
+    );
+
+    street
+}
+
+fn lane(lane: &Lane, dir: Direction) -> serde_json::Map<String, serde_json::value::Value> {
+    let mut segment = serde_json::Map::new();
+    segment.insert("id".to_string(), lane.id.to_string().into());
+    segment.insert("width".to_string(), lane.width.inner_meters().into());
+
+    // TODO I'm taking wild stabs at these values for now. Once I can visualize the results, will
+    // iterate on these.
+    let (segment_type, variant) = match lane.lane_type {
+        LaneType::Driving => match dir {
+            Direction::Fwd => ("drive-lane", "inbound|car"),
+            Direction::Back => ("drive-lane", "outbound|car"),
+        },
+        LaneType::Parking => match dir {
+            Direction::Fwd => ("parking-lane", "inbound|left"),
+            Direction::Back => ("parking-lane", "outbound|right"),
+        },
+        LaneType::Sidewalk => ("sidewalk", "dense"),
+        LaneType::Shoulder => ("sidewalk", "dense"),
+        LaneType::Biking => match dir {
+            Direction::Fwd => ("bike-lane", "inbound|green|road"),
+            Direction::Back => ("bike-lane", "outbound|green|road"),
+        },
+        LaneType::Bus => match dir {
+            Direction::Fwd => ("bus-lane", "inbound|shared"),
+            Direction::Back => ("bus-lane", "outbound|shared"),
+        },
+        LaneType::SharedLeftTurn => ("TODO", "TODO"),
+        LaneType::Construction => ("TODO", "TODO"),
+        LaneType::LightRail => ("TODO", "TODO"),
+    };
+    segment.insert("type".to_string(), segment_type.into());
+    segment.insert("variant".to_string(), variant.into());
+
+    segment
+}
diff --git a/game/src/edit/bulk.rs b/game/src/edit/bulk.rs
index c5c0493ba1..f603c2c1e3 100644
--- a/game/src/edit/bulk.rs
+++ b/game/src/edit/bulk.rs
@@ -44,6 +44,7 @@ fn make_select_panel(ctx: &mut EventCtx, selector: &RoadSelector) -> Panel {
                 selector.roads.len()
             ))
             .build(ctx, "export roads to shared-row", None),
+            Btn::text_fg("export one road to Streetmix").build_def(ctx, None),
             Btn::text_fg("Cancel").build_def(ctx, Key::Escape),
         ])
         .evenly_spaced(),
@@ -77,6 +78,21 @@ impl State for BulkSelect {
                         vec![format!("Roads exported to shared-row format at {}", path)],
                     ));
                 }
+                "export one road to Streetmix" => {
+                    let path = crate::debug::streetmix::export(
+                        *self.selector.roads.iter().next().unwrap(),
+                        &app.primary.map,
+                    );
+                    return Transition::Push(PopupMsg::new(
+                        ctx,
+                        "One road exported",
+                        vec![format!(
+                            "One arbitrary road from your selection exported to Streetmix format \
+                             at {}",
+                            path
+                        )],
+                    ));
+                }
                 x => {
                     if self.selector.event(ctx, app, Some(x)) {
                         self.panel = make_select_panel(ctx, &self.selector);