diff --git a/plugins/filltraffic.cpp b/plugins/filltraffic.cpp
index c27029a85..29ebdebaf 100644
--- a/plugins/filltraffic.cpp
+++ b/plugins/filltraffic.cpp
@@ -1,7 +1,8 @@
 // Wide-area traffic designation utility.
 // Flood-fill from cursor or fill entire map.
 
-#include <ctype.h>		//For toupper().
+#include <ctype.h>		//For toupper(). 
+#include <algorithm>    //for min().
 #include <map>
 #include <vector>
 #include <dfhack/Core.h>
@@ -15,8 +16,22 @@ using std::stack;
 using MapExtras::MapCache;
 using namespace DFHack;
 
+//Function pointer type for whole-map tile checks.
+typedef void (*checkTile)(DFHack::DFCoord, MapExtras::MapCache *);
+
+//Forward Declarations for Commands
 DFhackCExport command_result filltraffic(DFHack::Core * c, std::vector<std::string> & params);
-DFhackCExport command_result tiletraffic(DFHack::Core * c, std::vector<std::string> & params);
+DFhackCExport command_result alltraffic(DFHack::Core * c, std::vector<std::string> & params);
+
+//Forward Declarations for Utility Functions
+DFhackCExport command_result setAllMatching(DFHack::Core * c, checkTile checkProc,
+											DFHack::DFCoord minCoord = DFHack::DFCoord(0, 0, 0),
+											DFHack::DFCoord maxCoord = DFHack::DFCoord(0xFFFF, 0xFFFF, 0xFFFFFFFF));
+
+void allHigh(DFHack::DFCoord coord, MapExtras::MapCache * map);
+void allNormal(DFHack::DFCoord coord, MapExtras::MapCache * map);
+void allLow(DFHack::DFCoord coord, MapExtras::MapCache * map);
+void allRestricted(DFHack::DFCoord coord, MapExtras::MapCache * map);
 
 DFhackCExport const char * plugin_name ( void )
 {
@@ -27,7 +42,8 @@ DFhackCExport command_result plugin_init ( Core * c, std::vector <PluginCommand>
 {
     commands.clear();
 	commands.push_back(PluginCommand("filltraffic","Flood-fill with selected traffic designation from cursor",filltraffic));
-	commands.push_back(PluginCommand("tiletraffic","Set traffic for all tiles based on given criteria",tiletraffic));
+	commands.push_back(PluginCommand("alltraffic","Set traffic for the entire map",alltraffic));
+
     return CR_OK;
 }
 
@@ -60,7 +76,7 @@ DFhackCExport command_result filltraffic(DFHack::Core * c, std::vector<std::stri
                          "\tL: Low Traffic\n"
                          "\tR: Restricted Traffic\n"
                          "Other Options:\n"
-                         "\tX: Fill accross z-levels.\n"
+                         "\tX: Fill across z-levels.\n"
                          "\tB: Include buildings and stockpiles.\n"
                          "\tP: Include empty space.\n"
                          "Example:\n"
@@ -227,12 +243,10 @@ DFhackCExport command_result filltraffic(DFHack::Core * c, std::vector<std::stri
 
 enum e_checktype {no_check, check_equal, check_nequal};
 
-DFhackCExport command_result tiletraffic(DFHack::Core * c, std::vector<std::string> & params)
+DFhackCExport command_result alltraffic(DFHack::Core * c, std::vector<std::string> & params)
 {
-	//Target traffic types.
-	e_traffic target = traffic_normal;
-	//!!! Options Later !!!
-
+	void (*proc)(DFHack::DFCoord, MapExtras::MapCache *) = allNormal;
+	
 	//Loop through parameters
     for(int i = 0; i < params.size();i++)
     {
@@ -248,19 +262,30 @@ DFhackCExport command_result tiletraffic(DFHack::Core * c, std::vector<std::stri
             return CR_OK;
         }
 
+		//Pick traffic type. Possibly set bounding rectangle later.
 		switch (toupper(params[i][0]))
 		{
 			case 'H':
-				target = traffic_high; break;
+				proc = allHigh; break;
 			case 'N':
-				target = traffic_normal; break;
+				proc = allNormal; break;
 			case 'L':
-				target = traffic_low; break;
+				proc = allLow; break;
 			case 'R':
-				target = traffic_restricted; break;
+				proc = allRestricted; break;
 		}
     }
 
+    return setAllMatching(c, proc);
+}
+
+//Helper function for writing new functions that check every tile on the map.
+//newTraffic is the traffic designation to set.
+//check takes a coordinate and the map cache as arguments, and returns true if the criteria is met.
+//minCoord and maxCoord can be used to specify a bounding cube.
+DFhackCExport command_result setAllMatching(DFHack::Core * c, checkTile checkProc,
+											DFHack::DFCoord minCoord, DFHack::DFCoord maxCoord)
+{
 	//Initialization.
 	c->Suspend();
 
@@ -280,27 +305,76 @@ DFhackCExport command_result tiletraffic(DFHack::Core * c, std::vector<std::stri
     uint32_t tx_max = x_max * 16;
     uint32_t ty_max = y_max * 16;
 
+	//Ensure maximum coordinate is within map.  Truncate to map edge.
+	maxCoord.x = std::min((uint32_t) maxCoord.x, tx_max);
+	maxCoord.y = std::min((uint32_t) maxCoord.y, ty_max);
+	maxCoord.z = std::min(maxCoord.z,  z_max);
+
+	//Check minimum co-ordinates against maximum map size
+	if (minCoord.x > maxCoord.x) 
+	{
+		c->con.printerr("Minimum x coordinate is greater than maximum x coordinate.\n");
+        c->Resume();
+        return CR_FAILURE;
+	}
+	if (minCoord.y > maxCoord.y) 
+	{
+		c->con.printerr("Minimum y coordinate is greater than maximum y coordinate.\n");
+        c->Resume();
+        return CR_FAILURE;
+	}
+	if (minCoord.z > maxCoord.y) 
+	{
+		c->con.printerr("Minimum z coordinate is greater than maximum z coordinate.\n");
+        c->Resume();
+        return CR_FAILURE;
+	}
+
 	MapExtras::MapCache * MCache = new MapExtras::MapCache(Maps);
 
-	c->con.print("Entire map ... FILLING!\n");
+	c->con.print("Setting traffic...\n");
 
 	//Loop through every single tile
-	for(uint32_t x = 0; x <= tx_max; x++)
+	for(uint32_t x = minCoord.x; x <= maxCoord.x; x++)
 	{
-		for(uint32_t y = 0; y <= ty_max; y++)
+		for(uint32_t y = minCoord.y; y <= maxCoord.y; y++)
 		{
-			for(uint32_t z = 0; z <= z_max; z++)
+			for(uint32_t z = minCoord.z; z <= maxCoord.z; z++)
 			{
 				DFHack::DFCoord tile = DFHack::DFCoord(x, y, z);
-				DFHack::t_designation des = MCache->designationAt(tile);
-
-				des.bits.traffic = target;
-				MCache->setDesignationAt(tile, des);
+				checkProc(tile, MCache);
 			}
 		}
 	}
 
 	MCache->WriteAll();
+	c->con.print("Complete!\n");
     c->Resume();
     return CR_OK;
+}
+
+//Unconditionally set map to target traffic type
+void allHigh(DFHack::DFCoord coord, MapExtras::MapCache * map)
+{
+	DFHack::t_designation des = map->designationAt(coord);
+	des.bits.traffic = traffic_high;
+	map->setDesignationAt(coord, des);
+}
+void allNormal(DFHack::DFCoord coord, MapExtras::MapCache * map)
+{
+	DFHack::t_designation des = map->designationAt(coord);
+	des.bits.traffic = traffic_normal;
+	map->setDesignationAt(coord, des);
+}
+void allLow(DFHack::DFCoord coord, MapExtras::MapCache * map)
+{
+	DFHack::t_designation des = map->designationAt(coord);
+	des.bits.traffic = traffic_low;
+	map->setDesignationAt(coord, des);
+}
+void allRestricted(DFHack::DFCoord coord, MapExtras::MapCache * map)
+{
+	DFHack::t_designation des = map->designationAt(coord);
+	des.bits.traffic = traffic_restricted;
+	map->setDesignationAt(coord, des);
 }
\ No newline at end of file