diff --git a/src/depot_gui.cpp b/src/depot_gui.cpp
--- a/src/depot_gui.cpp
+++ b/src/depot_gui.cpp
@@ -398,7 +398,7 @@ struct DepotWindow : Window {
 		uint16 rows_in_display = wid->current_y / wid->resize_y;
 
 		uint16 num = this->vscroll->GetPosition() * this->num_columns;
-		int maxval = min(this->vehicle_list.Length(), num + (rows_in_display * this->num_columns));
+		int maxval = min(this->vehicle_list.size(), num + (rows_in_display * this->num_columns));
 		int y;
 		for (y = r.top + 1; num < maxval; y += this->resize.step_height) { // Draw the rows
 			for (byte i = 0; i < this->num_columns && num < maxval; i++, num++) {
@@ -413,11 +413,11 @@ struct DepotWindow : Window {
 			}
 		}
 
-		maxval = min(this->vehicle_list.Length() + this->wagon_list.Length(), (this->vscroll->GetPosition() * this->num_columns) + (rows_in_display * this->num_columns));
+		maxval = min(this->vehicle_list.size() + this->wagon_list.size(), (this->vscroll->GetPosition() * this->num_columns) + (rows_in_display * this->num_columns));
 
 		/* Draw the train wagons without an engine in front. */
 		for (; num < maxval; num++, y += this->resize.step_height) {
-			const Vehicle *v = this->wagon_list[num - this->vehicle_list.Length()];
+			const Vehicle *v = this->wagon_list[num - this->vehicle_list.size()];
 			this->DrawVehicleInDepot(v, r.left, r.right, y);
 		}
 	}
@@ -465,7 +465,7 @@ struct DepotWindow : Window {
 
 		uint pos = ((row + this->vscroll->GetPosition()) * this->num_columns) + xt;
 
-		if (this->vehicle_list.Length() + this->wagon_list.Length() <= pos) {
+		if (this->vehicle_list.size() + this->wagon_list.size() <= pos) {
 			/* Clicking on 'line' / 'block' without a vehicle */
 			if (this->type == VEH_TRAIN) {
 				/* End the dragging */
@@ -478,12 +478,12 @@ struct DepotWindow : Window {
 		}
 
 		bool wagon = false;
-		if (this->vehicle_list.Length() > pos) {
+		if (this->vehicle_list.size() > pos) {
 			*veh = this->vehicle_list[pos];
 			/* Skip vehicles that are scrolled off the list */
 			if (this->type == VEH_TRAIN) x += this->hscroll->GetPosition();
 		} else {
-			pos -= this->vehicle_list.Length();
+			pos -= this->vehicle_list.size();
 			*veh = this->wagon_list[pos];
 			/* free wagons don't have an initial loco. */
 			x -= ScaleGUITrad(VEHICLEINFO_FULL_VEHICLE_WIDTH);
@@ -726,7 +726,7 @@ struct DepotWindow : Window {
 		/* determine amount of items for scroller */
 		if (this->type == VEH_TRAIN) {
 			uint max_width = ScaleGUITrad(VEHICLEINFO_FULL_VEHICLE_WIDTH);
-			for (uint num = 0; num < this->vehicle_list.Length(); num++) {
+			for (uint num = 0; num < this->vehicle_list.size(); num++) {
 				uint width = 0;
 				for (const Train *v = Train::From(this->vehicle_list[num]); v != NULL; v = v->Next()) {
 					width += v->GetDisplayImageWidth();
@@ -734,11 +734,11 @@ struct DepotWindow : Window {
 				max_width = max(max_width, width);
 			}
 			/* Always have 1 empty row, so people can change the setting of the train */
-			this->vscroll->SetCount(this->vehicle_list.Length() + this->wagon_list.Length() + 1);
+			this->vscroll->SetCount(this->vehicle_list.size() + this->wagon_list.size() + 1);
 			/* Always make it longer than the longest train, so you can attach vehicles at the end, and also see the next vertical tile separator line */
 			this->hscroll->SetCount(max_width + ScaleGUITrad(2 * VEHICLEINFO_FULL_VEHICLE_WIDTH + 1));
 		} else {
-			this->vscroll->SetCount(CeilDiv(this->vehicle_list.Length(), this->num_columns));
+			this->vscroll->SetCount(CeilDiv(this->vehicle_list.size(), this->num_columns));
 		}
 
 		/* Setup disabled buttons. */
@@ -811,7 +811,7 @@ struct DepotWindow : Window {
 
 			case WID_D_SELL_ALL:
 				/* Only open the confirmation window if there are anything to sell */
-				if (this->vehicle_list.Length() != 0 || this->wagon_list.Length() != 0) {
+				if (this->vehicle_list.size() != 0 || this->wagon_list.size() != 0) {
 					TileIndex tile = this->window_number;
 					byte vehtype = this->type;