diff --git a/editoast/src/views/infra/delimited_area.rs b/editoast/src/views/infra/delimited_area.rs
index 00b3af531bb..b1413d7d6fa 100644
--- a/editoast/src/views/infra/delimited_area.rs
+++ b/editoast/src/views/infra/delimited_area.rs
@@ -1,4 +1,4 @@
-use crate::error::{EditoastError, InternalError, Result};
+use crate::error::Result;
 use crate::infra_cache::{Graph, InfraCache};
 use crate::models::Infra;
 use crate::views::infra::{InfraApiError, InfraIdParam};
@@ -12,14 +12,13 @@ use editoast_schemas::{
     infra::{Direction, DirectionalTrackRange, Endpoint, Sign, TrackEndpoint},
     primitives::Identifier,
 };
-use itertools::Itertools;
+use itertools::{Either, Itertools};
 use serde::{Deserialize, Serialize};
 use std::{
     cmp::Ordering,
     collections::{HashMap, HashSet},
     result::Result as StdResult,
 };
-use axum::http::StatusCode;
 use thiserror::Error;
 use utoipa::ToSchema;
 use editoast_derive::EditoastError;
@@ -62,14 +61,19 @@ struct DirectedLocation {
     direction: Direction,
 }
 
-#[derive(Debug, Error,Serialize, Deserialize, EditoastError)]
+#[derive(Debug, Error, Serialize, Deserialize, EditoastError)]
 #[editoast_error(base_id = "delimited_area")]
+enum DelimitedAreaViewError {
+    #[error("{0:?}")]
+    #[editoast_error(status = 400)]
+    InvalidLocations(Vec<DelimitedAreaError>),
+}
+
+#[derive(Debug, Error, Serialize, Deserialize)]
 enum DelimitedAreaError {
     #[error("Track '{0}' does not exist")]
-    #[editoast_error(status = 400)]
     TrackDoesNotExist(String),
     #[error("Invalid input position '{position}' on track '{track}' of length '{track_length}'")]
-    #[editoast_error(status = 400)]
     LocationOutOfBounds { track: String, position: f64, track_length: f64 },
 }
 
@@ -133,20 +137,23 @@ async fn delimited_area(
     // Validate user input
 
     let (valid_entries, invalid_entries): (Vec<_>, Vec<_>) = entries.into_iter()
-        .partition(|entry| validate_location(entry, &infra_cache).is_ok());
+        .partition_map(|entry| {
+            match validate_location(&entry, &infra_cache) {
+                Ok(_) => Either::Left(entry),
+                Err(e) => Either::Right(e),
+            }
+        });
     let (valid_exits, invalid_exits): (Vec<_>, Vec<_>) = exits.into_iter()
-        .partition(|exit| validate_location(exit, &infra_cache).is_ok());
+        .partition_map(|exit| {
+            match validate_location(&exit, &infra_cache) {
+                Ok(_) => Either::Left(exit),
+                Err(e) => Either::Right(e),
+            }
+        });
 
     if !(invalid_exits.is_empty() && invalid_entries.is_empty()) {
-        // Throw an error 4xx which contains the list of invalid input locations
-        let location_errors = HashMap::new();
-        return Err(InternalError {
-            // TODO
-            status: StatusCode::BAD_REQUEST,
-            error_type: "".to_string(),
-            context: location_errors,
-            message: "Some locations were invalid".to_string()
-        });
+        let invalid_locations = invalid_entries.into_iter().chain(invalid_exits.into_iter()).collect::<Vec<_>>();
+        return Err(DelimitedAreaViewError::InvalidLocations(invalid_locations).into());
     }
 
     // Retrieve the track ranges
@@ -886,4 +893,13 @@ mod tests {
         // N.B. This is mostly a performance issue.
         unimplemented!();
     }
+
+    #[rstest]
+    #[ignore]
+    async fn request_with_invalid_locations_is_rejected() {
+        /// Invalid locations (invalid track number, location position not on the track...)
+        /// get rejected with a 400 error code and the response contains context about
+        /// which locations were invalid and how they were invalid.
+        todo!()
+    }
 }