diff --git a/modules/services/taginfo.js b/modules/services/taginfo.js
index 0df8cd83c..2cb12fbfc 100644
--- a/modules/services/taginfo.js
+++ b/modules/services/taginfo.js
@@ -9,12 +9,26 @@ var taginfo = {},
         area: 'count_ways',
         line: 'count_ways'
     },
+    tag_sort_members = {
+        point: 'count_node_members',
+        vertex: 'count_node_members',
+        area: 'count_way_members',
+        line: 'count_way_members',
+        relation: 'count_relation_members'
+    },
     tag_filters = {
         point: 'nodes',
         vertex: 'nodes',
         area: 'ways',
         line: 'ways'
     };
+    tag_members_fractions = {
+        point: 'count_node_members_fraction',
+        vertex: 'count_node_members_fraction',
+        area: 'count_way_members_fraction',
+        line: 'count_way_members_fraction',
+        relation: 'count_relation_members_fraction'
+    };
 
 
 function sets(parameters, n, o) {
@@ -32,6 +46,10 @@ function setSort(parameters) {
     return sets(parameters, 'sortname', tag_sorts);
 }
 
+function setSortMembers(parameters) {
+    return sets(parameters, 'sortname', tag_sort_members);
+}
+
 function clean(parameters) {
     return _.omit(parameters, 'geometry', 'debounce');
 }
@@ -57,6 +75,14 @@ function filterValues(allowUpperCase) {
     };
 }
 
+function filterRoles(geometry) {
+    return function(d) {
+        if (d.role === '') return false; // exclude empty role
+        if (d.role.match(/[A-Z*;,]/) !== null) return false;  // exclude uppercase letters and some punctuation
+        return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
+    };
+}
+
 function valKey(d) {
     return {
         value: d.key,
@@ -71,6 +97,13 @@ function valKeyDescription(d) {
     };
 }
 
+function roleKey(d) {
+    return {
+        value: d.role,
+        title: d.role
+    };
+}
+
 // sort keys with ':' lower than keys without ':'
 function sortKeys(a, b) {
     return (a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1) ? -1
@@ -146,6 +179,23 @@ export function init() {
             });
     };
 
+    taginfo.roles = function(parameters, callback) {
+        var debounce = parameters.debounce;
+        var geometry = parameters.geometry;
+        parameters = clean(setSortMembers(parameters));
+        request(endpoint + 'relation/roles?' +
+            qsString(_.extend({
+                rp: 25,
+                sortname: 'count_all_members',
+                sortorder: 'desc',
+                page: 1
+            }, parameters)), debounce, function(err, d) {
+                if (err) return callback(err);
+                var f = filterRoles(geometry);
+                callback(null, d.data.filter(f).map(roleKey));
+            });
+    };
+
     taginfo.docs = function(parameters, callback) {
         var debounce = parameters.debounce;
         parameters = clean(setSort(parameters));
diff --git a/modules/ui/raw_member_editor.js b/modules/ui/raw_member_editor.js
index 6e8b4c053..5e5e45830 100644
--- a/modules/ui/raw_member_editor.js
+++ b/modules/ui/raw_member_editor.js
@@ -113,8 +113,51 @@ export function RawMemberEditor(context) {
                 .on('click', deleteMember)
                 .call(Icon('#operation-delete'));
 
+            if (context.taginfo()) {
+                $enter.each(bindTypeahead);
+            }
+
             $items.exit()
+                .each(unbind)
                 .remove();
+
+            function bindTypeahead(d) {
+                var row = d3.select(this),
+                    role = row.selectAll('input.member-role');
+    
+                function sort(value, data) {
+                    var sameletter = [],
+                        other = [];
+                    for (var i = 0; i < data.length; i++) {
+                        if (data[i].value.substring(0, value.length) === value) {
+                            sameletter.push(data[i]);
+                        } else {
+                            other.push(data[i]);
+                        }
+                    }
+                    return sameletter.concat(other);
+                }
+    
+                role.call(d3.combobox()
+                    .fetcher(function(role, callback) {
+                        var rtype = entity.tags.type;
+                        context.taginfo().roles({
+                            debounce: true,
+                            rtype: rtype || '',
+                            geometry: context.geometry(d.member.id),
+                            query: role
+                        }, function(err, data) {
+                            if (!err) callback(sort(role, data));
+                        });
+                    }));
+            }
+    
+            function unbind() {
+                var row = d3.select(this);
+    
+                row.selectAll('input.member-role')
+                    .call(d3.combobox.off);
+            }
         }
     }
 
diff --git a/modules/ui/raw_membership_editor.js b/modules/ui/raw_membership_editor.js
index 0168e626c..d4cc1b25f 100644
--- a/modules/ui/raw_membership_editor.js
+++ b/modules/ui/raw_membership_editor.js
@@ -159,7 +159,12 @@ export function RawMembershipEditor(context) {
                 .on('click', deleteMembership)
                 .call(Icon('#operation-delete'));
 
+            if (context.taginfo()) {
+                $enter.each(bindTypeahead);
+            }
+
             $items.exit()
+                .each(unbind)
                 .remove();
 
             if (showBlank) {
@@ -213,6 +218,44 @@ export function RawMembershipEditor(context) {
                     content($wrap);
                     $list.selectAll('.member-entity-input').node().focus();
                 });
+
+            function bindTypeahead(d) {
+                var row = d3.select(this),
+                    role = row.selectAll('input.member-role');
+    
+                function sort(value, data) {
+                    var sameletter = [],
+                        other = [];
+                    for (var i = 0; i < data.length; i++) {
+                        if (data[i].value.substring(0, value.length) === value) {
+                            sameletter.push(data[i]);
+                        } else {
+                            other.push(data[i]);
+                        }
+                    }
+                    return sameletter.concat(other);
+                }
+    
+                role.call(d3.combobox()
+                    .fetcher(function(role, callback) {
+                        var rtype = d.relation.tags.type;
+                        context.taginfo().roles({
+                            debounce: true,
+                            rtype: rtype || '',
+                            geometry: context.geometry(id),
+                            query: role
+                        }, function(err, data) {
+                            if (!err) callback(sort(role, data));
+                        });
+                    }));
+            }
+    
+            function unbind() {
+                var row = d3.select(this);
+    
+                row.selectAll('input.member-role')
+                    .call(d3.combobox.off);
+            }
         }
     }