diff --git a/pre/src/dijkstra.rs b/pre/src/dijkstra.rs
index a6a7ee9..27e53ca 100644
--- a/pre/src/dijkstra.rs
+++ b/pre/src/dijkstra.rs
@@ -54,7 +54,7 @@ impl Dijkstra {
             self.heap.push(MinHeapItem::new(start, 0));
         }
         if self.visited.is_visited(end) {
-            return self.resolve_path(end, &edges, with_path);
+            return Some(self.resolve_path(end, &edges, with_path));
         }
         self.dist[start] = (0, None);
         self.reachable.set_visited(start);
@@ -82,22 +82,17 @@ impl Dijkstra {
             self.visited.set_visited(node);
             // found end
             if node == end {
-                return self.resolve_path(end, &edges, with_path);
+                return Some(self.resolve_path(end, &edges, with_path));
             }
         }
         None
     }
 
     /// recreate path, of already visited
-    fn resolve_path(
-        &self,
-        end: NodeId,
-        edges: &[Way],
-        with_path: bool,
-    ) -> Option<(Vec<NodeId>, usize)> {
+    fn resolve_path(&self, end: NodeId, edges: &[Way], with_path: bool) -> (Vec<NodeId>, usize) {
         let weight = self.dist[end].0;
         if !with_path {
-            return Some((Vec::new(), weight));
+            return (Vec::new(), weight);
         }
         let mut path = Vec::with_capacity(self.dist.len() / 2);
         let mut current_dist = self.dist[end];
@@ -106,7 +101,7 @@ impl Dijkstra {
             current_dist = self.dist[edges[prev].source];
         }
         path.reverse();
-        Some((path, weight))
+        (path, weight)
     }
 }
 
diff --git a/pre/src/graph_helper.rs b/pre/src/graph_helper.rs
index 7934d06..7a17eeb 100644
--- a/pre/src/graph_helper.rs
+++ b/pre/src/graph_helper.rs
@@ -3,7 +3,7 @@ use super::*;
 /// get all up edges from one node
 #[allow(dead_code)]
 pub fn get_edges_from_id(ids: Vec<EdgeId>, edges: &[Way]) -> Vec<Way> {
-    return ids.par_iter().map(|x| edges[*x]).collect();
+    return ids.iter().map(|x| edges[*x]).collect();
 }
 
 /// get all up edge-ids from one node
@@ -20,7 +20,7 @@ pub fn get_down_edge_ids(
     down_index: &[EdgeId],
 ) -> Vec<EdgeId> {
     let prev: Vec<EdgeId> = (down_offset[node]..down_offset[node + 1]).collect();
-    return prev.par_iter().map(|x| down_index[*x]).collect();
+    return prev.iter().map(|x| down_index[*x]).collect();
 }
 
 /// get all down edge-ids from one node
@@ -54,7 +54,7 @@ pub fn get_all_edge_ids(
 #[allow(dead_code)]
 pub fn get_up_neighbors(node: NodeId, edges: &[Way], up_offset: &[EdgeId]) -> Vec<EdgeId> {
     let next = get_up_edge_ids(node, &up_offset);
-    let mut tmp: Vec<EdgeId> = next.par_iter().map(|x| edges[*x].target).collect();
+    let mut tmp: Vec<EdgeId> = next.iter().map(|x| edges[*x].target).collect();
     tmp.dedup();
     tmp
 }
@@ -68,7 +68,7 @@ pub fn get_down_neighbors(
     down_index: &[EdgeId],
 ) -> Vec<EdgeId> {
     let prev = get_down_edge_ids(node, &down_offset, &down_index);
-    let mut tmp: Vec<EdgeId> = prev.par_iter().map(|x| edges[*x].source).collect();
+    let mut tmp: Vec<EdgeId> = prev.iter().map(|x| edges[*x].source).collect();
     tmp.par_sort_unstable();
     tmp.dedup();
     tmp
diff --git a/pre/src/grid.rs b/pre/src/grid.rs
index b9afd8f..f7764a7 100644
--- a/pre/src/grid.rs
+++ b/pre/src/grid.rs
@@ -30,12 +30,14 @@ fn get_min_max(nodes: &[Node]) -> GridBounds {
     }
 }
 
+#[allow(clippy::suspicious_operation_groupings)]
 fn get_grid_lat(node: &Node, grid_bounds: &GridBounds) -> usize {
     let lat_percent =
         (node.latitude - grid_bounds.lat_min) / (grid_bounds.lat_max - grid_bounds.lat_min);
     (lat_percent * (LAT_GRID_AMOUNT - 1) as f32) as usize
 }
 
+#[allow(clippy::suspicious_operation_groupings)]
 fn get_grid_lng(node: &Node, grid_bounds: &GridBounds) -> usize {
     let lng_percent =
         (node.longitude - grid_bounds.lng_min) / (grid_bounds.lng_max - grid_bounds.lng_min);
diff --git a/pre/src/offset.rs b/pre/src/offset.rs
index cde701b..d041020 100644
--- a/pre/src/offset.rs
+++ b/pre/src/offset.rs
@@ -23,12 +23,12 @@ pub fn generate_offsets_unstable(
     down_offset.resize(amount_nodes + 1, 0);
 
     // generate up edges
-    let sources: Vec<EdgeId> = edges.par_iter().map(|x| x.source).rev().collect();
+    let sources: Vec<EdgeId> = edges.iter().map(|x| x.source).rev().collect();
     fill_offset(sources, &mut up_offset);
 
     // generate down edges, but without sorting edges
     // first collect offsets
-    let targets: Vec<EdgeId> = edges.par_iter().map(|x| x.target).rev().collect();
+    let targets: Vec<EdgeId> = edges.iter().map(|x| x.target).rev().collect();
     fill_offset(targets, &mut down_offset);
     let mut down_index = vec![INVALID_EDGE; edges.len()];
     // fill offsets, where not already filled
diff --git a/web/src/bidijkstra.rs b/web/src/bidijkstra.rs
index a4ce6e0..be84973 100644
--- a/web/src/bidijkstra.rs
+++ b/web/src/bidijkstra.rs
@@ -5,8 +5,8 @@ use visited_list::*;
 
 #[derive(Clone)]
 pub struct Dijkstra {
-    dist_up: Vec<(NodeId, Option<Weight>)>,
-    dist_down: Vec<(NodeId, Option<Weight>)>,
+    dist_up: Vec<(Weight, Option<EdgeId>)>,
+    dist_down: Vec<(Weight, Option<EdgeId>)>,
     visited_up: VisitedList,
     visited_down: VisitedList,
     heap_up: BinaryHeap<MinHeapItem>,
@@ -145,7 +145,7 @@ impl Dijkstra {
         if meeting_node == INVALID_NODE {
             None
         } else {
-            self.resolve_path(meeting_node, best_weight, nodes[meeting_node].rank, &edges)
+            Some(self.resolve_path(meeting_node, best_weight, nodes[meeting_node].rank, &edges))
         }
     }
 
@@ -156,7 +156,7 @@ impl Dijkstra {
         weight: Weight,
         meeting_rank: Rank,
         edges: &[Way],
-    ) -> Option<(Vec<NodeId>, f32)> {
+    ) -> (Vec<NodeId>, f32) {
         assert!(self.visited_up.is_visited(meeting_node));
         assert!(self.visited_down.is_visited(meeting_node));
 
@@ -174,7 +174,7 @@ impl Dijkstra {
             self.walk_down(down_edge.1.unwrap(), false, &mut path, &edges);
         }
 
-        Some((path, weight as f32 / DIST_MULTIPLICATOR as f32))
+        (path, weight as f32 / DIST_MULTIPLICATOR as f32)
     }
 
     // walk shortcuts from meeting point to end
diff --git a/web/src/graph_helper.rs b/web/src/graph_helper.rs
index cb77f6f..31fc3d0 100644
--- a/web/src/graph_helper.rs
+++ b/web/src/graph_helper.rs
@@ -3,7 +3,7 @@ use super::*;
 /// get all up edges from one node
 #[allow(dead_code)]
 pub fn get_edges_from_id(ids: Vec<EdgeId>, edges: &[Way]) -> Vec<Way> {
-    return ids.par_iter().map(|x| edges[*x]).collect();
+    return ids.iter().map(|x| edges[*x]).collect();
 }
 
 /// get all up edge-ids from one node
@@ -20,7 +20,7 @@ pub fn get_down_edge_ids(
     down_index: &[EdgeId],
 ) -> Vec<EdgeId> {
     let prev: Vec<EdgeId> = (down_offset[node]..down_offset[node + 1]).collect();
-    return prev.par_iter().map(|x| down_index[*x]).collect();
+    return prev.iter().map(|x| down_index[*x]).collect();
 }
 
 /// get all down edge-ids from one node
@@ -54,7 +54,7 @@ pub fn get_all_edge_ids(
 #[allow(dead_code)]
 pub fn get_up_neighbors(node: NodeId, edges: &[Way], up_offset: &[EdgeId]) -> Vec<EdgeId> {
     let next = get_up_edge_ids(node, &up_offset);
-    let mut tmp: Vec<EdgeId> = next.par_iter().map(|x| edges[*x].target).collect();
+    let mut tmp: Vec<EdgeId> = next.iter().map(|x| edges[*x].target).collect();
     tmp.dedup();
     tmp
 }
@@ -68,7 +68,7 @@ pub fn get_down_neighbors(
     down_index: &[EdgeId],
 ) -> Vec<EdgeId> {
     let prev = get_down_edge_ids(node, &down_offset, &down_index);
-    let mut tmp: Vec<EdgeId> = prev.par_iter().map(|x| edges[*x].source).collect();
+    let mut tmp: Vec<EdgeId> = prev.iter().map(|x| edges[*x].source).collect();
     tmp.par_sort_unstable();
     tmp.dedup();
     tmp
diff --git a/web/src/grid.rs b/web/src/grid.rs
index c7e2826..ff2f17c 100644
--- a/web/src/grid.rs
+++ b/web/src/grid.rs
@@ -146,12 +146,14 @@ fn get_points_from_cells(
     result
 }
 
+#[allow(clippy::suspicious_operation_groupings)]
 fn get_grid_lat(node: &Node, grid_bounds: &GridBounds) -> usize {
     let lat_percent =
         (node.latitude - grid_bounds.lat_min) / (grid_bounds.lat_max - grid_bounds.lat_min);
     (lat_percent * (LAT_GRID_AMOUNT - 1) as f32) as usize
 }
 
+#[allow(clippy::suspicious_operation_groupings)]
 fn get_grid_lng(node: &Node, grid_bounds: &GridBounds) -> usize {
     let lng_percent =
         (node.longitude - grid_bounds.lng_min) / (grid_bounds.lng_max - grid_bounds.lng_min);