diff --git a/build.gradle b/build.gradle
index 447d712a..561c9db8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -60,7 +60,7 @@ configure(subprojects - project(':android')) {
 subprojects {
 	version = '2.0.0-beta'
 	ext.appName = 'Terminal Control 2'
-	ext.buildVersion = 8
+	ext.buildVersion = 9
 	repositories {
 		mavenCentral()
 		maven { url 'https://s01.oss.sonatype.org' }
diff --git a/core/src/main/kotlin/com/bombbird/terminalcontrol2/traffic/TrafficTools.kt b/core/src/main/kotlin/com/bombbird/terminalcontrol2/traffic/TrafficTools.kt
index ba99f805..99aed9ec 100644
--- a/core/src/main/kotlin/com/bombbird/terminalcontrol2/traffic/TrafficTools.kt
+++ b/core/src/main/kotlin/com/bombbird/terminalcontrol2/traffic/TrafficTools.kt
@@ -708,9 +708,9 @@ fun calculateAdditionalTimeToNextDeparture(backlog: Int, maxAdvDep: Int): Int {
     val threshold1 = (maxAdvDep * 0.5f).roundToInt()
     return when {
         backlog >= 10 -> 0
-        backlog >= -threshold1 -> 0 + 120 * (10 - backlog) / (10 + threshold1)
-        backlog >= -maxAdvDep -> 120 + (320 - 120) * (-threshold1 - backlog) / (maxAdvDep - threshold1)
-        else -> 320
+        backlog >= -threshold1 -> 0 + 240 * (10 - backlog) / (10 + threshold1)
+        backlog >= -maxAdvDep -> 240 + (640 - 240) * (-threshold1 - backlog) / (maxAdvDep - threshold1)
+        else -> 640
     }
 }
 
diff --git a/core/src/test/kotlin/TrafficToolsTest.kt b/core/src/test/kotlin/TrafficToolsTest.kt
index e49fa09b..6bcd5ce3 100644
--- a/core/src/test/kotlin/TrafficToolsTest.kt
+++ b/core/src/test/kotlin/TrafficToolsTest.kt
@@ -9,16 +9,16 @@ object TrafficToolsTest: FunSpec() {
             calculateAdditionalTimeToNextDeparture(24, 40) shouldBe 0
             calculateAdditionalTimeToNextDeparture(15, 40) shouldBe 0
             calculateAdditionalTimeToNextDeparture(10, 40) shouldBe 0
-            calculateAdditionalTimeToNextDeparture(3, 40) shouldBe 28
-            calculateAdditionalTimeToNextDeparture(-14, 40) shouldBe 96
-            calculateAdditionalTimeToNextDeparture(-6, 20) shouldBe 96
-            calculateAdditionalTimeToNextDeparture(-20, 40) shouldBe 120
-            calculateAdditionalTimeToNextDeparture(-29, 40) shouldBe 210
-            calculateAdditionalTimeToNextDeparture(-58, 80) shouldBe 210
-            calculateAdditionalTimeToNextDeparture(-40, 40) shouldBe 320
-            calculateAdditionalTimeToNextDeparture(-47, 40) shouldBe 320
-            calculateAdditionalTimeToNextDeparture(-30, 20) shouldBe 320
-            calculateAdditionalTimeToNextDeparture(-15, 10) shouldBe 320
+            calculateAdditionalTimeToNextDeparture(3, 40) shouldBe 56
+            calculateAdditionalTimeToNextDeparture(-14, 40) shouldBe 192
+            calculateAdditionalTimeToNextDeparture(-6, 20) shouldBe 192
+            calculateAdditionalTimeToNextDeparture(-20, 40) shouldBe 240
+            calculateAdditionalTimeToNextDeparture(-29, 40) shouldBe 420
+            calculateAdditionalTimeToNextDeparture(-58, 80) shouldBe 420
+            calculateAdditionalTimeToNextDeparture(-40, 40) shouldBe 640
+            calculateAdditionalTimeToNextDeparture(-47, 40) shouldBe 640
+            calculateAdditionalTimeToNextDeparture(-30, 20) shouldBe 640
+            calculateAdditionalTimeToNextDeparture(-15, 10) shouldBe 640
         }
     }
 }