diff --git a/facetapi.admin.inc b/facetapi.admin.inc
index 3e934a8..c9ed826 100644
--- a/facetapi.admin.inc
+++ b/facetapi.admin.inc
@@ -659,11 +659,12 @@ function facetapi_facet_display_form($form, &$form_state, FacetapiAdapter $adapt
   $form['#submit'][] = 'facetapi_facet_display_form_submit';
   $form['#validate'][] = 'facetapi_facet_display_form_validate';
 
-  // Allow the realm and adapter to alter the form.
+  // Allow the realm, adapter, and URL  to alter the form.
   if ($realm['settings callback']) {
     $realm['settings callback']($form, $form_state);
   }
   $adapter->settingsForm($form, $form_state);
+  $adapter->getUrlProcessor()->settingsForm($form, $form_state);
 
   return $form;
 }
diff --git a/plugins/facetapi/adapter.inc b/plugins/facetapi/adapter.inc
index 846e378..9574fe5 100644
--- a/plugins/facetapi/adapter.inc
+++ b/plugins/facetapi/adapter.inc
@@ -634,6 +634,9 @@ abstract class FacetapiAdapter {
       // Apply the adapter's default settings.
       $this->settings[$name]->settings += $this->getDefaultSettings();
 
+      // Apply the URL processor's default settings.
+      $this->settings[$name]->settings += $this->getUrlProcessor()->getDefaultSettings();
+
       // Applies each dependency plugin's default settings.
       foreach ($facet['dependency plugins'] as $id) {
         $class = ctools_plugin_load_class('facetapi', 'dependencies', $id, 'handler');
diff --git a/plugins/facetapi/url_processor.inc b/plugins/facetapi/url_processor.inc
index 4dca2b2..c5c72e0 100644
--- a/plugins/facetapi/url_processor.inc
+++ b/plugins/facetapi/url_processor.inc
@@ -144,4 +144,21 @@ abstract class FacetapiUrlProcessor {
   public function getFilterKey() {
     return $this->filterKey;
   }
+
+  /**
+   * Allows for processor specific overrides to the settings form.
+   */
+  public function settingsForm(&$form, &$form_state) {
+    // Nothing to do...
+  }
+
+  /**
+   * Provides default values for the backend specific settings.
+   *
+   * @return array
+   *   The defaults keyed by setting name to value.
+   */
+  public function getDefaultSettings() {
+    return array();
+  }
 }
diff --git a/plugins/facetapi/url_processor_standard.inc b/plugins/facetapi/url_processor_standard.inc
index 2444c08..636d2bb 100644
--- a/plugins/facetapi/url_processor_standard.inc
+++ b/plugins/facetapi/url_processor_standard.inc
@@ -11,6 +11,13 @@
 class FacetapiUrlProcessorStandard extends FacetapiUrlProcessor {
 
   /**
+   * Stores the "limit_active_items" settings for each facet.
+   *
+   * @var array
+   */
+  protected $limitActiveItems = array();
+
+  /**
    * Implements FacetapiUrlProcessor::fetchParams().
    *
    * Pulls facet params from the $_GET variable.
@@ -42,6 +49,17 @@ class FacetapiUrlProcessorStandard extends FacetapiUrlProcessor {
       }
       elseif (!$active) {
         $field_alias = rawurlencode($facet['field alias']);
+
+        // Strips all other filters for this facet if limit option is set.
+        if ($this->limitActiveItems($facet)) {
+          foreach ($qstring[$this->filterKey] as $pos => $filter) {
+            if (0 === strpos($filter, $field_alias)) {
+              unset($qstring[$this->filterKey][$pos]);
+            }
+          }
+        }
+
+        // Adds the filter to the query string.
         $qstring[$this->filterKey][] = $field_alias . ':' . $value;
       }
     }
@@ -53,6 +71,20 @@ class FacetapiUrlProcessorStandard extends FacetapiUrlProcessor {
   }
 
   /**
+   * Checks the facet's global "limit_active_items" settings.
+   *
+   * @return int
+   *   Whether or not to limit active items to one per facet.
+   */
+  public function limitActiveItems(array $facet) {
+    if (!isset($this->limitActiveItems[$facet['name']])) {
+      $settings = $this->adapter->getFacetSettingsGlobal($facet);
+      $this->limitActiveItems[$facet['name']] = $settings->settings['limit_active_items'];
+    }
+    return $this->limitActiveItems[$facet['name']];
+  }
+
+  /**
    * Implements FacetapiUrlProcessor::setBreadcrumb().
    */
   public function setBreadcrumb() {
@@ -103,4 +135,33 @@ class FacetapiUrlProcessorStandard extends FacetapiUrlProcessor {
     // Sets the breadcrumb trail with h keys and filters.
     drupal_set_breadcrumb($breadcrumb);
   }
+
+  /**
+   * Allows for processor specific overrides to the settings form.
+   */
+  public function settingsForm(&$form, &$form_state) {
+    $facet = $form['#facetapi']['facet'];
+    $settings = $this->adapter->getFacetSettingsGlobal($facet);
+
+    $form['global']['limit_active_items'] = array(
+      '#type' => 'checkbox',
+      '#title' => t('Limit to one active item'),
+      '#prefix' => '<div class="facetapi-global-setting">',
+      '#suffix' => '</div>',
+      '#default_value' => !empty($settings->settings['limit_active_items']),
+      '#description' => t('Enabling this option allows only one item to be active at a time.'),
+    );
+  }
+
+  /**
+   * Provides default values for the backend specific settings.
+   *
+   * @return array
+   *   The defaults keyed by setting name to value.
+   */
+  public function getDefaultSettings() {
+    return array(
+      'limit_active_items' => 0
+    );
+  }
 }