diff --git a/frontend/src/Sidebar/ResultsContainer.jsx b/frontend/src/Sidebar/ResultsContainer.jsx
new file mode 100644
index 0000000..1e97309
--- /dev/null
+++ b/frontend/src/Sidebar/ResultsContainer.jsx
@@ -0,0 +1,55 @@
+import { useContext, useState, useEffect } from 'react'
+import { DataContext } from '../Layout'
+import BigButton from './BigButton'
+
+export default function ResultsContainer(){
+    const [ isFetchingData, setIsFetchingData ] = useState(false)
+    const [ progress, setProgress ] = useState(-1)
+    const { data } = useContext(DataContext)
+    useEffect(()=>{
+        data.queue.on('active',()=>{
+            setProgress( 100 * data.queryCountFinished / data.queryCount )
+        })
+    },[])
+    return (
+        <div>
+            {!isFetchingData && <>
+                {data.queryCount} travel time{data.queryCount == 1 ? '' : 's'} to be queried
+            </>}
+            {data.queryCount > 0 && !isFetchingData && !data.allQueriesHaveData &&
+                <BigButton onClick={()=>{
+                    setIsFetchingData(true)
+                    data.fetchAllResults().then( () => {
+                        setIsFetchingData(false)
+                    } )
+                }}>Submit Query</BigButton>
+            }
+            {isFetchingData && <>
+                <p>Finished fetching {data.queryCountFinished}/{data.queryCount} results</p>
+                <ProgressBar percentDone={progress}/>
+            </>}
+            {data.allQueriesHaveData && <>
+                    <a download='results.json'
+                        href={`data:text/plain;charset=utf-8,${encodeURIComponent(JSON.stringify(data.travelTimeQueries.map(r=>r.resultsRecord('json'))))}`}
+                    >
+                        <BigButton>Download results as JSON</BigButton>
+                    </a>
+                    <a download='results.csv'
+                        href={`data:text/plain;charset=utf-8,${encodeURIComponent([...data.travelTimeQueries[0].resultsRecord('').keys()].join(',') + '\n' + data.travelTimeQueries.map(r=>r.resultsRecord('csv')).join('\n'))}`}
+                    >
+                        <BigButton>Download results as CSV </BigButton>
+                    </a>
+                </>
+            }
+        </div>
+    )
+}
+
+function ProgressBar({percentDone}){
+    return (
+        <svg viewBox='0 0 100 7'>
+            <rect height='100%' width='100%' fill='white' stroke='black' strokeWidth='1'/>
+            <rect height='100%' width={percentDone} fill='darkgreen' strokeWidth='1'/>
+        </svg>
+    )
+}
\ No newline at end of file
diff --git a/frontend/src/Sidebar/index.jsx b/frontend/src/Sidebar/index.jsx
index 642a6d4..7e7ab91 100644
--- a/frontend/src/Sidebar/index.jsx
+++ b/frontend/src/Sidebar/index.jsx
@@ -1,8 +1,9 @@
-import { useContext, useState } from 'react'
+import { useContext } from 'react'
 import { DataContext } from '../Layout'
 
 import FactorContainer from './FactorContainer'
 import BigButton from './BigButton'
+import ResultsContainer from './ResultsContainer'
 import FactorList from './FactorList'
 import { restoreStateFromFile } from './restoreStateFromFile.js'
 import './sidebar.css'
@@ -29,51 +30,7 @@ export default function SidebarContent(){
             <div className='big-math-symbol'>&#xd7;</div>
             <HolidaysContainer/>
             <div className='big-math-symbol'>=</div> 
-            <Results/>
-        </div>
-    )
-}
-
-function Results(){
-    const [ results, setResults ] = useState(undefined)
-    const [ isFetchingData, setIsFetchingData ] = useState(false)
-    const { data } = useContext(DataContext)
-    const numResults = data.travelTimeQueries.length
-    return (
-        <div>
-            {numResults} travel time{numResults == 1 ? '' : 's'} to estimate currently
-            {numResults > 0 && ! isFetchingData &&
-                <BigButton onClick={()=>{
-                    setResults(undefined)
-                    setIsFetchingData(true)
-                    data.fetchAllResults().then( () => {
-                        setIsFetchingData(false)
-                        setResults(data.travelTimeQueries)
-                    } )
-                }}>
-                    Submit Query
-                </BigButton>
-            }
-            {isFetchingData &&
-                <p>Please wait while your request is being processed</p>
-            }
-            {results && <>
-                    <a download='results.json'
-                        href={`data:text/plain;charset=utf-8,${encodeURIComponent(JSON.stringify(results.map(r=>r.resultsRecord('json'))))}`}
-                    >
-                        <BigButton>
-                            Download results as JSON
-                        </BigButton>
-                    </a>
-                    <a download='results.csv'
-                        href={`data:text/plain;charset=utf-8,${encodeURIComponent([...results[0].resultsRecord('').keys()].join(',') + '\n' + results.map(r=>r.resultsRecord('csv')).join('\n'))}`}
-                    >
-                        <BigButton>
-                            Download results as CSV 
-                        </BigButton>
-                    </a>
-                </>
-            }
+            <ResultsContainer/>
         </div>
     )
 }
diff --git a/frontend/src/corridor.js b/frontend/src/corridor.js
index 47ba0f8..431efe4 100644
--- a/frontend/src/corridor.js
+++ b/frontend/src/corridor.js
@@ -29,6 +29,7 @@ export class Corridor extends Factor {
             .then( () => {
                 // notify the layout that the path is ready to be rendered
                 logActivity('shortest path returned')
+                this.hasUpdated()
             } )
     }
     get intersections(){ return [...this.#intersections.values()] }
diff --git a/frontend/src/dateRange.js b/frontend/src/dateRange.js
index bff9576..96b90ed 100644
--- a/frontend/src/dateRange.js
+++ b/frontend/src/dateRange.js
@@ -26,10 +26,12 @@ export class DateRange extends Factor {
     }
     setStartDate(inputDate){
         this.#startDate = inputDate
+        this.hasUpdated()
         return this.#startDate
     }
     setEndDate(inputDate){
         this.#endDate = inputDate
+        this.hasUpdated()
         return this.#endDate
     }
     static dateFormatted(datetime){
diff --git a/frontend/src/days.js b/frontend/src/days.js
index 933f921..b798cc2 100644
--- a/frontend/src/days.js
+++ b/frontend/src/days.js
@@ -30,10 +30,15 @@ export class Days extends Factor {
     addDay(number){
         if( daylist.map(d=>d.iso).includes(parseInt(number)) ){
             this.#days.add(parseInt(number))
+            this.hasUpdated()
         }
     }
     removeDay(number){
-        this.#days.delete(parseInt(number))
+        let dayNum = parseInt(number)
+        if(this.#days.has(dayNum)){
+            this.#days.delete(dayNum)
+            this.hasUpdated()
+        }
     }
     hasDay(number){
         return this.#days.has(parseInt(number))
diff --git a/frontend/src/factor.js b/frontend/src/factor.js
index c9d76d9..e46b1d2 100644
--- a/frontend/src/factor.js
+++ b/frontend/src/factor.js
@@ -27,4 +27,8 @@ export class Factor {
     render(){ // this will be overwritten but must be implemented
         return <></>
     }
+    hasUpdated(){
+        // should be called when a factor has been updated
+        this.#dataContext.updateQueries()
+    }
 }
\ No newline at end of file
diff --git a/frontend/src/holidayOption.js b/frontend/src/holidayOption.js
index f9c9d35..8a4773d 100644
--- a/frontend/src/holidayOption.js
+++ b/frontend/src/holidayOption.js
@@ -3,7 +3,7 @@ import { Factor } from './factor.js'
 export class HolidayOption extends Factor {
     #includeHolidays
     #dataContext
-    constructor(dataContext,includeHolidays){
+    constructor(dataContext, includeHolidays){
         super(dataContext)
         // store this here too to actually access the holiday data
         this.#dataContext = dataContext
diff --git a/frontend/src/spatialData.js b/frontend/src/spatialData.js
index 93d1650..1533af4 100644
--- a/frontend/src/spatialData.js
+++ b/frontend/src/spatialData.js
@@ -53,6 +53,7 @@ export class SpatialData {
         let days = new Days(this)
         this.#factors.push(days)
         days.activate()
+        this.updateQueries() // this is the only factor that starts out complete
         return days
     }
     get segments(){
@@ -63,6 +64,7 @@ export class SpatialData {
     }
     dropFactor(factor){
         this.#factors = this.#factors.filter(f => f != factor)
+        this.updateQueries()
     }
     deactivateOtherFactors(factor){
         this.#factors.forEach( f => {
@@ -70,20 +72,37 @@ export class SpatialData {
         } )
     }
     includeHolidays(){
-        this.holidayOptions.forEach(f => this.dropFactor(f))
-        this.#factors.push(new HolidayOption(this,true))
+        this.holidayOptions.forEach( factor => {
+            if(!factor.holidaysIncluded) this.dropFactor(factor)
+        } )
+        if(this.holidayOptions.length == 0){
+            this.#factors.push(new HolidayOption(this,true))
+        }
+        this.updateQueries()
     }
     excludeHolidays(){
-        this.holidayOptions.forEach(f => this.dropFactor(f))
-        this.#factors.push(new HolidayOption(this,false))
+        this.holidayOptions.forEach( factor => {
+            if(factor.holidaysIncluded) this.dropFactor(factor)
+        } )
+        if(this.holidayOptions.length == 0){
+            this.#factors.push(new HolidayOption(this,false))
+        }
+        this.updateQueries()
     }
     includeAndExcludeHolidays(){
-        this.holidayOptions.forEach(f => this.dropFactor(f))
-        this.#factors.push(new HolidayOption(this,true))
-        this.#factors.push(new HolidayOption(this,false))
+        console.assert(this.holidayOptions.length == 1)
+        // add a factor for whatever the opposite of the existing one is
+        this.#factors.push(
+            new HolidayOption(
+                this,
+                ! this.holidayOptions[0].holidaysIncluded
+            )
+        )
+        this.updateQueries() 
     }
-    get travelTimeQueries(){
-        // is the crossproduct of all complete/valid factors
+    updateQueries(){
+        // this should be run any time the inputs change to keep the list fresh
+        // queries are the crossproduct of all complete/valid factors
         const crossProduct = []
         this.corridors.filter(c=>c.isComplete).forEach( corridor => {
             this.timeRanges.filter(tr=>tr.isComplete).forEach( timeRange => {
@@ -104,17 +123,19 @@ export class SpatialData {
                 } )
             } )
         })
-        // add new travelTimeRequests
+        // add any new travelTimeRequests
         crossProduct.forEach( TTQ => {
             if( ! this.#queries.has(TTQ.URI) ){
                 this.#queries.set(TTQ.URI,TTQ)
             }
         } )
-        // remove old/modified travelTimeRequests
+        // remove any old/modified travelTimeRequests
         let currentURIs = new Set(crossProduct.map(TTI=>TTI.URI))
         let currentKeys = [...this.#queries.keys()]
         currentKeys.filter( key => ! currentURIs.has(key) )
             .forEach( key => this.#queries.delete(key) )
+    }
+    get travelTimeQueries(){
         return [...this.#queries.values()].sort((a,b)=> a.URI < b.URI ? -1 : 1)
     }
     fetchAllResults(){
@@ -124,4 +145,15 @@ export class SpatialData {
                 .map( TTQ => () => TTQ.fetchData() )
         )
     }
+    get queue(){ return this.#queue }
+    get allQueriesHaveData(){
+        return ( // some queries, all with data
+            this.queryCount > 0
+            && this.queryCount == this.queryCountFinished
+        )
+    }
+    get queryCount(){ return this.#queries.size }
+    get queryCountFinished(){
+        return [...this.#queries.values()].filter(q=>q.hasData).length
+    }
 }
diff --git a/frontend/src/timeRange.js b/frontend/src/timeRange.js
index ba0a628..22ef535 100644
--- a/frontend/src/timeRange.js
+++ b/frontend/src/timeRange.js
@@ -45,10 +45,12 @@ export class TimeRange extends Factor {
     }
     setStartTime(input){
         this.#startTime = TimeRange.parseTime(input)
+        this.hasUpdated()
         return this.#startTime
     }
     setEndTime(input){
         this.#endTime = TimeRange.parseTime(input)
+        this.hasUpdated()
         return this.#endTime
     }
     static timeFormatted(datetime){