diff --git a/src/transport_performance/gtfs/multi_validation.py b/src/transport_performance/gtfs/multi_validation.py
index e3a75e12..a3bc443a 100644
--- a/src/transport_performance/gtfs/multi_validation.py
+++ b/src/transport_performance/gtfs/multi_validation.py
@@ -75,6 +75,10 @@ class MultiGtfsInstance:
         creates a calendar table from calendar_times.
     get_dates()
         Get the range of dates that the gtfs(s) span.
+    plot_routes()
+        Plot a timeseries of route counts.
+    plot_trips()
+        Plot a timeseries of trip counts.
 
     Raises
     ------
@@ -765,7 +769,7 @@ def _plot_core(
         kwargs["width"] = width
         kwargs["height"] = height
         if title:
-            PLOT_TITLE["title"] = title
+            PLOT_TITLE["text"] = title
         # plotting
         fig = px.line(df, x="date", y=count_col, labels=LABEL_FORMAT, **kwargs)
         fig.update_layout(title=PLOT_TITLE)
@@ -824,3 +828,59 @@ def plot_routes(
             kwargs=plotly_kwargs,
         )
         return figure
+
+    def plot_trips(
+        self,
+        route_type: bool = True,
+        width: int = 1000,
+        height: int = 550,
+        title: str = None,
+        plotly_kwargs: dict = None,
+    ) -> go.Figure:
+        """Create a line plot of trip counts over time.
+
+        Parameters
+        ----------
+        route_type : bool, optional
+            Whether or not to draw a line for each modality, by default True
+        width : int, optional
+            Plot width, by default 1000
+        height : int, optional
+            Plot height, by default 550
+        title : str, optional
+            Plot title, by default None
+        plotly_kwargs : dict, optional
+            Kwargs to pass to plotly.express.line, by default None
+
+        Returns
+        -------
+        go.Figure
+            The timerseries plot
+
+        """
+        # NOTE: Very similar to the above function, however not enough code
+        # to justify creating a shared function (would probably results in a
+        # similar amount)
+        # defences
+        _type_defence(route_type, "route_type", bool)
+        _type_defence(plotly_kwargs, "plotly_kwargs", (dict, type(None)))
+        if not plotly_kwargs:
+            plotly_kwargs = {}
+        # prepare data
+        data = self.summarise_trips().copy()
+        if not route_type:
+            data = (
+                data.drop("route_type", axis=1)
+                .groupby("date")
+                .sum()
+                .reset_index()
+            )
+        figure = self._plot_core(
+            data,
+            "trip_count",
+            width=width,
+            height=height,
+            title=title,
+            kwargs=plotly_kwargs,
+        )
+        return figure
diff --git a/tests/gtfs/test_multi_validation.py b/tests/gtfs/test_multi_validation.py
index 3b830501..8ec5c9e4 100644
--- a/tests/gtfs/test_multi_validation.py
+++ b/tests/gtfs/test_multi_validation.py
@@ -13,6 +13,7 @@
 import pandas as pd
 import folium
 from pyprojroot import here
+import plotly.graph_objs as go
 
 from transport_performance.gtfs.multi_validation import (
     MultiGtfsInstance,
@@ -665,3 +666,35 @@ def test_get_dates(self, multi_gtfs_fixture, multi_gtfs_altered_fixture):
             len(multi_gtfs_altered_fixture.get_dates(return_range=False)) == 6
         ), "Unexpected number of dates"
         pass
+
+    def test__plot_core(self, multi_gtfs_fixture, tmp_path):
+        """General tests for _plot_core()."""
+        # route summary
+        data = multi_gtfs_fixture.summarise_routes()
+        route_fig = multi_gtfs_fixture._plot_core(data, "route_count")
+        assert isinstance(route_fig, go.Figure), "Route counts not plotted"
+        # trip summary
+        data = multi_gtfs_fixture.summarise_trips()
+        trip_fig = multi_gtfs_fixture._plot_core(data, "trip_count")
+        assert isinstance(trip_fig, go.Figure), "Trip counts not plotted"
+        # trip summary with custom title
+        trip_fig = multi_gtfs_fixture._plot_core(
+            data, "trip_count", title="test"
+        )
+        found_title = trip_fig.layout["title"]["text"]
+        assert found_title == "test", "Title not as expected"
+        # trip summary with custom dimensions
+        trip_fig = multi_gtfs_fixture._plot_core(
+            data, "trip_count", height=100, width=150
+        )
+        found_height = trip_fig.layout["height"]
+        found_width = trip_fig.layout["width"]
+        assert found_height == 100, "Height not as expected"
+        assert found_width == 150, "Width not as expected"
+        # custom kwargs
+        trip_fig = multi_gtfs_fixture._plot_core(
+            data, "trip_count", kwargs={"markers": True}
+        )
+        assert (
+            trip_fig.data[0]["mode"] == "markers+lines"
+        ), "Markers not plotted"