diff --git a/common/timing.cc b/common/timing.cc
index 6a91b6e5..d110498c 100644
--- a/common/timing.cc
+++ b/common/timing.cc
@@ -38,10 +38,11 @@ void TimingAnalyser::setup()
     run();
 }
 
-void TimingAnalyser::run()
+void TimingAnalyser::run(bool update_route_delays)
 {
     reset_times();
-    get_route_delays();
+    if (update_route_delays)
+        get_route_delays();
     walk_forward();
     walk_backward();
     compute_slack();
@@ -149,6 +150,8 @@ void TimingAnalyser::get_route_delays()
     }
 }
 
+void TimingAnalyser::set_route_delay(CellPortKey port, DelayPair value) { ports.at(port).route_delay = value; }
+
 void TimingAnalyser::topo_sort()
 {
     TopoSort<CellPortKey> topo;
diff --git a/common/timing.h b/common/timing.h
index c5799b41..6548757b 100644
--- a/common/timing.h
+++ b/common/timing.h
@@ -97,9 +97,13 @@ struct TimingAnalyser
   public:
     TimingAnalyser(Context *ctx) : ctx(ctx){};
     void setup();
-    void run();
+    void run(bool update_route_delays = true);
     void print_report();
 
+    // This is used when routers etc are not actually binding detailed routing (due to congestion or an abstracted
+    // model), but want to re-run STA with their own calculated delays
+    void set_route_delay(CellPortKey port, DelayPair value);
+
     float get_criticality(CellPortKey port) const { return ports.at(port).worst_crit; }
     float get_setup_slack(CellPortKey port) const { return ports.at(port).worst_setup_slack; }
     float get_domain_setup_slack(CellPortKey port) const