diff -r 818fb5fd73fd src/signs_gui.cpp
--- a/src/signs_gui.cpp	Sun Jan 03 14:16:47 2010 +0100
+++ b/src/signs_gui.cpp	Sun Jan 03 14:20:42 2010 +0100
@@ -121,6 +121,10 @@
 };
 
 struct SignListWindow : QueryStringBaseWindow, SignList {
+private:
+	int selected_sign;
+
+public:
 	int text_offset; // Offset of the sign text relative to the left edge of the SLW_LIST widget.
 
 	SignListWindow(const WindowDesc *desc, WindowNumber window_number) : QueryStringBaseWindow(MAX_LENGTH_SIGN_NAME_BYTES)
@@ -134,6 +138,7 @@
 
 		/* Initialize the filtering variables */
 		this->SetFilterString("");
+		this->selected_sign = -1;
 
 		/* Create initial list. */
 		this->signs.ForceRebuild();
@@ -172,6 +177,10 @@
 			this->SetWidgetDirty(SLW_FILTER_CLEAR_BTN);
 		}
 
+		if ((this->selected_sign > -1) && ((uint)this->selected_sign >= this->signs.Length())) { // Can happen when a new filter is used.
+			this->selected_sign = this->signs.Length () - 1;
+		}
+
 		this->UpdateList();
 	}
 
@@ -181,6 +190,36 @@
 		this->InvalidateData(0);
 		this->SetDirty();
 	}
+
+	void SelectNextSign()
+	{
+		this->selected_sign++;
+		if ((uint)this->selected_sign >= this->signs.Length()) {
+			this->selected_sign = this->signs.Length () - 1;
+		}
+
+		/* Scroll down a half page if moving below last line */
+		if (this->selected_sign >= this->vscroll.GetCapacity() + this->vscroll.GetPosition()) {
+			int pos = Clamp(this->vscroll.GetPosition() + this->vscroll.GetCapacity()/2 + 1,  0, this->vscroll.GetCount() - this->vscroll.GetCapacity());
+			this->vscroll.SetPosition(pos);
+		}
+
+		this->SetDirty();
+	}
+
+	void SelectPreviousSign()
+	{
+		this->selected_sign--;
+		if (this->selected_sign < 0) this->selected_sign = 0;
+
+		/* Scroll up a half page if moving above first line */
+		if (this->selected_sign < this->vscroll.GetPosition()) {
+			int pos = Clamp(this->vscroll.GetPosition() - this->vscroll.GetCapacity()/2 - 1,  0, this->vscroll.GetCount() - this->vscroll.GetCapacity());
+			this->vscroll.SetPosition(pos);
+		}
+
+		this->SetDirty();
+ 	}
 
 	virtual void OnPaint()
 	{
@@ -212,7 +251,11 @@
 					if (si->owner != OWNER_NONE) DrawCompanyIcon(si->owner, icon_left, y + sprite_offset_y);
 
 					SetDParam(0, si->index);
-					DrawString(text_left, text_right, y, STR_SIGN_NAME, TC_YELLOW);
+					if (this->selected_sign == i) {
+						DrawString(text_left, text_right, y, STR_SIGN_NAME, TC_BLUE);
+					} else {
+						DrawString(text_left, text_right, y, STR_SIGN_NAME, TC_YELLOW);
+					}
 					y += this->resize.step_height;
 				}
 				break;
@@ -242,6 +285,7 @@
 			case SLW_FILTER_CLEAR_BTN:
 				this->ClearFilterTextWidget();
 				this->SetFilterString(0);
+				this->selected_sign = -1;
 				break;
 
 			case SLW_FILTER_MATCH_CASE_BTN:
@@ -272,23 +316,30 @@
 				this->SetFilterString(this->text.buf);
 				break;
 
-			case HEBR_CONFIRM: // Enter pressed -> goto first sign in list
-				if (this->signs.Length() >= 1) {
-					const Sign* si = this->signs[0];
-					ScrollMainWindowToTile(TileVirtXY(si->x, si->y));
+			case HEBR_CONFIRM: { // Enter pressed -> goto selected sign in list (or first if no selected sign)
+				uint n_signs = this->signs.Length();
+				if (n_signs >= 1) {
+					uint sign_id = this->selected_sign == -1 || (uint)this->selected_sign >= n_signs ? 0 : this->selected_sign;
+					if (n_signs > sign_id) {
+						const Sign* si = this->signs[sign_id];
+						ScrollMainWindowToTile(TileVirtXY(si->x, si->y));
+					}
 				}
 				return state;
+			}
 
 			case HEBR_CANCEL: // ESC pressed, clear filter
 				this->ClearFilterTextWidget(); // Empty the text in the EditBox widget
 				this->SetFilterString(0);      // Use empty text as filter text (= view all signs)
 				this->UnfocusFocusedWidget();  // Unfocus the text box
+				this->selected_sign = -1;      // Deselect sign in sign list
 				return state;
 
 			case HEBR_NOT_FOCUSED: // The filter text box is not globaly focused
 				if (keycode == 'F') { // Hotkey to enable filter box
 					this->SetFocusedWidget(SLW_FILTER_TEXT);
 					SetFocusedWindow(this); // The user has asked to give focus to the text box, so make sure this window is focused.
+
 					state = ES_HANDLED;
 				}
 				break;
@@ -298,6 +349,20 @@
 		}
 
 		if (state == ES_HANDLED) OnOSKInput(SLW_FILTER_TEXT);
+
+		/* Selection of signs using arrow up/down keys */
+		if (this->IsWidgetGloballyFocused(SLW_FILTER_TEXT)) {
+			switch (keycode) {
+				case WKC_UP:
+					this->SelectPreviousSign();
+					state = ES_HANDLED;
+					break;
+
+				case WKC_DOWN:
+					this->SelectNextSign();
+					state = ES_HANDLED;
+			}
+		}
 
 		return state;
 	}