P1TS Release Notes


🐞 =Bug fix
Pay attention

5.0.0.Roar (p1ts.com-only)

Home: Updated 2019 Buy Now pricing, including WeatherTech GTD Sprint.

4.22.0.ATL (p1ts.com-only)

Network: Added Road Atlanta replays to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.

4.20.1.LAG (p1ts.com-only)

Network: Added Laguna Seca replays to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.


🐞 Network: Fixed long delay loading the P1TS web app in Chrome browsers that have not cached DroidSans fonts.

4.17.1.VIR (p1ts.com-only)

🐞 Network: Fixed long delay loading the P1TS web app in Chrome browsers that have not cached DroidSans fonts.
Network: Added VIR replays to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.


Leaderboard: Purple and Green backgrounds for fast lap times are now used for improved contrast.
🐞 Leaderboard: Fixed rare Est Tm bug that assumed the working lap's remaining sector times would take -1 seconds.
🐞 Leaderboard: Fixed Lamborghini Super Trofeo class colors so they match the colors on the track map.
Track Map: Added sector and turn labels for VIR and Road Atlanta.
Network: Added Road America replays to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.

4.15.1.LimeRock (p1ts.com-only)

Network: Added LRP replays to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.


Welcome: Added pitstop delta prompt for gapchart reference line and track map hero tail.
🐞 Welcome: Fixed bug when both Welcome and Hide Cars on Track Map dialogs displays, it mistakenly overwrites the Hero car setting with the hidden cars.
Leaderboard: Improved green and purple foreground to follow car background color contrast.

4.12.4.WatkinsGlen (p1ts.com-only)

Network: Added CTMP replays to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.

4.12.3.WatkinsGlen (p1ts.com-only)

Network: Added WGI replays to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.


Track Map: Updated Watkins Glen sector labels to reflect the new 2018 timing loop between Turns 8 and 9 resulting in 11 sectors.


Leaderboard: Added new Est Tm column that displays each car's estimated lap time using the Best Lap's sector times. The time will be Green if the estimate is faster than the Best Lap Time. if the estimate is faster than the Last Lap Time.
Leaderboard: Updated Lap Tm and Best Tm columns to be purple if they are fastest in class.
Pit In-Out Stints: Drive Times now begin at Sess Tm 0 and end when the session expires, per Supplementary Regulations 12.11.1 and 12.11.4.
X-Pits and Stints: Added a new Reinitialize Chart button - when pressed after a session begins, it will repair any possibly missing chart headers for the 30-minute vertical rules and back-timed pit stops P◀. See the X-Pits and Stints video.
🐞 Leaderboard: Fixed Pit Sector segments to be red when a car pits. Formerly all segments turned red.
Sectors: Updated Driver column to honor Driver Maximum characters from Settings.
Welcome: Updated Version and Expiration date to display in the Welcome dialog.
Network: Added Belle-Isle replays added to playback menu.

4.8.1.MidOhio (p1ts.com-only)

Network: Mid-Ohio replays added to playback menu.


Network: Barber and Long Beach replays added to playback menu.
Various internal updates.


Leaderboard: L Tm values will now be green if it is the car's best time. Likewise, the individual bars in Sector progress bar chart will also be green if it is the car's best sector time.
Track Map: Barber track map has been added, however if IMSA only has 3 sectors (as they did in 2017), estimated car position within a sector will likely be misleading. You may want to use the circular track map.
Track Map: Mid-Ohio track map has been added.

4.5.2.Sebring (p1ts.com-only)

Network: Sebring replays added to playback menu.
🐞 X-App: Eliminate >30 sec app start up time.
User Guide: Clarify 10. Replay section - which instances can play which replay file sources.


X-App: Pits and Stints chart allows you to quickly see competitors's pit stop and driver change strategies.
X-App: Pace table shows the most recent pace of each car, comparisons to the hero, and naive predictions of the ETA when a pass might occur based on pace.
X-App: Sorted Lap Times chart has been temporarily removed while we work on its performance.

4.5.0.Sebring (p1ts.com-only)

X-App: A preview of Pits and Stints is available to run online at p1ts.com. Modelled after the P1Analysis report with the same name, this chart is live! The full Windows version for your PCs will appear in 4.5.1.Sebring race week.

4.2.2.Daytona (p1ts.com-only)

Network: Daytona replays added to playback menu. See the User Guide's 10. Replay section for downloading and replaying arbitrary sessions.


🐞 Track Map: Fix regression introduced in 4.1.1 counter clockwise circular map where cars incorrectly went clockwise. All other maps worked correctly. The usefulness of the circular map is shown here.
Doc: User Guide has been updated and red revision lined.


Leaderboard: New L Stnt (laps in stint) column added to leaderboard. Companion to the existing Pit (lap) column.
Leaderboard, Track Map: Continental TCR car class color is now blue. ST is now gold.
Leaderboard: Hovering over column headings displays column definitions.
Network: Now has an alternative Connect button.

4.1.1.Roar (p1ts.com-only)

Network: Roar replays added to playback menu.


P1TS-CSV: New p1ts-csv Windows tool for Excel.
P1TS-X: In addition to the X-Pace tab, there is a New X-Sorted Lap Times app answering "What are everyone's fastest lap times?"

3.28.4.DEC (p1ts.com-only)

P1TS-CSV: New p1ts-csv Windows tool for Excel.

3.28.3.DEC (p1ts.com-only)

Network: P1TS Server ERMon source is now displayed.

3.28.2.DEC (p1ts.com-only)

API: cardata.laps now has di (driver ID), cp (class position), and f (flag) fields for each lap.

3.28.1.DEC (p1ts.com-only)

P1TS Fact Sheet

3.25.1.ATL (p1ts.com-only)

Network: ATL race replays added to playback menu.


🐞 Track Map: Fix Proximity List's Class Position display so it is not stuck on starting positions.
Settings: On webapp start up, if you've previously set cars in Hide Cars on Track Map, a reminder dialog will now appear asking if you want to clear it, so no cars are hidden.

3.23.2.MRLS (p1ts.com-only)

Network: MRLS race replays added to playback menu.


🐞 Track Map: Fix new Proximity List so it is visible on iPad and iPhone (WebKit) browsers.


Track Map: New Proximity List more clearly shows track ordering within a proximity distance of the hero, particularly useful during yellows and restarts.
🐞 Gap Chart: Fix missing line plots for cars #1 through #9 on the gap chart.
Track Map: Class leader radar lines are now wider, making them easier to find.
X-Pace: Add B Tm best lap time and Stint time columns.
X-Pace: Color coding changed to Green=Catching leaders, Red=Threat from behind.
Network: VIR race replays added to playback menu.


🐞 Track Map: Fix Safety and Emergency vehicles so they automatically appear. Formerly we needed to refresh the browser for them to appear.
Track Map: Panel height can be made taller or shorter via the View menu.
Track Map: Safety and Emergency car labels are larger to make it easier to see.
Track Map: Hero tail is wider to make it easier to see.
Track Map: Safety and Emergency vehicles now move at 60 mph. Competitors no longer pass the Safety Car within a sector.
X-Pace: New experimental app that answers - "what pace are my opponents running and when will I catch them?".
Network: Replay +10 Sec, +1 Min, and +10 Min fast forward buttons added.

3.17.1.RA (p1ts.com-only)

Network: RA race replays added to playback menu.
🐞 Network: Fix Network/Replay/Rewind from stopping playback.

3.15.1.LRP (p1ts.com-only)

Network: LRP race replays added to playback menu.


Track Map: Class leaders now have partial radar lines making them easier to find.
Track Map: Class leader and sister car target box thicknesses have been increased from 1px to 2px to improve visibility.
Track Map: Sector label color changed from gray to gold to improve visibility.
Track Map: Hero tail on circular map is easy to see - it now follows a smaller radius path.
Track Map: Add turn and sector labels to LRP and VIR maps.

3.14.0.CTMP (p1ts.com-only)

Network: CTMP race replays added to playback menu.
Flags: Panel can be collapsed via a new twistie triangle ▸.
Pit In/Out Stints: Panel can be collapsed via a new twistie triangle ▸.

3.9.1.WatkinsGlen (p1ts.com-only)

Network: WGI race replays added to playback menu.


Track Map: View has rotate, pan, zoom buttons.
Track Map: Stretched to width of panel.
Track Map: Add sector labels for WGI and CTMP.
Track Map: VIR map is now landscape oriented.
Network: Detroit race added to playback menu.


🐞 Sectors: Purple sectors during the working lap will now be appropriately colored.
Release Notes: Marked notes with 🐞 or .

3.7.3.CoTA (p1ts.com-only)

🐞 Leaderboard: Fix table cell background colors, etc. when columns have been rearranged.
Network: Replay now works with replay files in results.imsa.com zipped files. 2017 CoTA races now available.
Network: New Track Map Performance field displays frames per second.


🐞 Sectors: Fix intermittent problem at CoTA where Lap Tm was greater than actual value. Intermittent oddities in CoTA data stream sequencing caused S11 sector times to be incorrectly summed a second time by P1TS, so displayed lap times were sometimes 8-10 seconds too long.
Network: Add Network Troubleshooting button.


Leaderboard, Sectors, Flags, Stints: Table settings are now "sticky". Rearranged columns, hidden columns, rows per page, etc. are now automatically saved and restored.
Sectors: Smaller up/down triangles conserve horizontal spacing.


P1TS Server Window: Its title bar now displays its IP address, so ipconfig.exe can be avoided.
Leaderboard, Sectors: Add column for tracks (e.g., Sebring, CoTA, Detroit) having a second speed trap (formerly only the last trap was displayed). Also replace generic "Trap" column label with the speed trap's name.
Sectors: Don't consider pit sector times in theoretical or rolling time calculations. This was especially bad at Road Atlanta where pit entry sectors are shorter than the corresponding on-track sectors.
Sectors: Pit-in, pit-out, and pit lane sector times are now in red.
Track Map: Add sector labels for CoTA and Detroit.


Track Map: Add Turn and Sector labels to Long Beach circuit.


Track Map: Circular map's Start/Finish is now at 12 o'clock position.


Leaderboard: Highlight sister cars.
Gap Chart: Highlight sister cars.
User Guide: Update track map and other sections.
Quick Start Sheet: New single page sheet.
Network Troubleshooting Sheet: New single page sheet.


🐞 Status Bar: Fix Laps Completed and Grn Laps Rem count down during practice and qualifying due to Al Kamel ERMon $G bug.
Status Bar: Grn Laps Rem now displays tenths of a lap.
Track Map: Radar lines highlight new Sister car Settings.
Track Map: Horizontally center the map.
Track Map: Label Sebring's turns and sectors. These may be hidden via the Settings tab.
Track Map: New View ... menu has shortcuts to show settings.
Track Map: New Show Follow 1 data boards setting allows you to show or hide the data boards that accompany the follow 1 cars.
Replay: New Downloaded Replay option.


🐞 Track Map: Fix 3.3.0.Test bug where Hero's lap time was not visible.


🐞 Sectors: Handle previously missing laps resulting from sporadically inconsistent ERMon stream. Also compensate for occasional bugs in ERMon's lap count that caused the incorrect Best lap time to be displayed in the Sector panels, because the incorrect lap was referenced.
🐞 Leaderboard: Handle missing ERMon pit out line crossings that caused the P Ln clock to continue counting.
Track Map: Larger Pit Lane Follow 1 markers.
Start/Finish Crossings: This table is now hidden by default to increase Track Map real estate. Can be viewed via Settings checkbox.
🐞 Any table: Fix table settings (e.g., number of rows) were not remembered after 2 hours.
Version: The second number now adopts IMSA's event numbering convention. Here's how to decode P1TS's new version scheme for 3.3.0.Test:
  • 3 - 3rd year of P1TS
  • 3 - 3rd IMSA event of the year (1-Roar, 2-Daytona, 3-Feb Test)
  • 0 - Event's software release number
  • Test - Human friendly event name


🐞 Pit In-Out Stints: Handle unexpected ERMon race start flag sequence (Finish precedes Green start!) causing only a single row to be displayed for 2017 Daytona WSC and CTSC races instead of a row for every pit in-out stint. (This sequence never occurred either during 2017 Daytona's practice/qualifying or any past events - previously, the "blank" flag occurred before race start.) To avoid premature stint processing termination due to odd flag sequences, the stint clocks will continue running past Finish.
Pit In-Out Stints: Add time of day column.
🐞 Track Map: Handle unexpected ERMon switch to transponder numbers instead of car numbers, causing car markers to stop moving (e.g., 2017 Continental Race 2:30pm - 2:50pm).
Track Map: Show Cars on Pit Lane setting allows you to reduce pit lane column noise by filtering the cars displayed.
Track Map: Show cars leaving pit out (e.g. P2 to T3). This pit out sector formerly did not show animated cars.
Track Map: Increase circuit's line width.
Flags: Add time of day column.
🐞 Leaderboard: Populate the empty Trap column. (This was a regression introduced in 2.10.VIR.0.)
🐞 Leaderboard: Once a car leaves pit lane (POP crossing), its Sector and Pit columns no longer has the incorrect (red) pit lane color coding. (The "P Ln" time was correctly (red) color coded.)
Settings: Reduce white space padding for more compact Settings and Dialog boxes.


Pit In-Out Stints: Format times to 0.01 precision. Will make this configurable for Sebring code.


Pit In-Out Stints: No longer increments pit lane time when there are missing Pit-Out line crossings, like at 2017 Roar.


Start: Login Credentials are now mandatory both at the track and on P1TS.com.
Install: Add P1TS Server shortcut icons on Windows Desktop, Start Menu, and Startup.
Network tab: Now shows account Username and license expiration.
Track Map: Can set cars to Hide. Useful for removing "stranded" cars.
Track Map: Safetly/emergency car markers automatically removed after 2 minutes (settable) or when Green flag resumes.
Track Map: Remove occasional gaps in Pit Lane list.
Track Map: Fix S/F line position for Sebring, Detroit, Laguna Seca.
Replay: P1TS Server must now be online to access Internet replay files.


Fix Intermittent network that caused P1TS freeze during 2017 Roar.
Track Map defaults to larger opaque objects for improved visibility.
Users can switch to the original "Track Map - Transparent" by installing the Style Chooser Chrome Extension.
Users can zoom Chrome windows and tabs individually by installing the W Zoom Chrome Extension.
iPad now correctly displays Track Map's circular car markers (meatballs).
Leaderboard's Model column has been renamed and changed to display Mfr.
Driver and Mfr column character widths in Strat 1 can now be changed in Settings.
Add 2017 Roar Network/Replay items.


Fix Expiration message blocks P1TS install.


Minor tweaks before the Roar.


Add Strat 1 single view web app. All your panels arranged in one window!!!
Complete Install Guide.


Add more Track Maps.
Very early Install Guide with Network diagrams.


🐞 Fix Track Map problems with WSC December Test ERMon data stream.


Add Track tab.
  • Add Start/Finish line crossing order.
  • Add Track map.
Add Sectors / Best Lap Range.


Leaderboard graphical sector progress bars.
Reposition Best columns towards left side of Leaderboard during Practice/Qualifying.
Add 2016 COTA to Network tab's Replay selections.


Networking improvements between P1TS's webapp and it server.
Add informational message, "(At least 2 completed laps are needed to plot Hero's Gap Chart)"


🐞 Follow cars and class coloring now work for Lamborghini series.
Add 2016 RA to Network tab's Replay selections.


🐞 Adapt Race Gap Chart to LRP IMSA ERMon 13.13 data stream. For certain cars, the hero's zero reference line at times appeared zig-zagged and stair-stepped.
Now allow as small as +/-5 second Race Gap Chart zoom.
Synchronize class colored buttons on Leaderboard class-selector and Sectors car-selector.
Add 2016 LRP to Network tab's Replay selections.


🐞 Adapt to CTMP/WGI/DET Practice/Qualifying/Race aberrations in IMSA ERMon 13.13.
Pit In-Out Stints now stops recording times after the car takes the checkers. It formerly continued tallying even after the car took the checkers.
Various cosmetic readability improvements:
  • Class specific elements are now colored red, blue, gold, green.
  • Tables are now zebra striped.
  • Leaderboard tab's Follow 1 and Follow 2 rows now have gray background color.
  • Sectors tab's table is less susceptible to column jitter.
  • Sectors tab's working lap sector background cursor becomes red while the car is in pit lane.
Sector tab's car selection buttons now responds better to user clicks on slow machines.
Network tab has New Replay controls allowing you to select, play, pause, rewind, skip, and also adjust the playback speed. Replay is only available at http://www.p1ts.com and is disabled at the live servers at the track.
Currently, sessions earlier than 2016 Detroit will not replay correctly and thus are not offered. This may be resolved in the future depending upon your feedback.
Changing replayed events no longer causes pop up alerts when the number of sectors changes from track to track.

2-7-CTMP-1 (was never deployed at Mosport)

🐞 Adapt to WGI/DET Practice/Qualifying abberations in IMSA ERMon 13.13.
Sector tab's car selection buttons now responds better to user clicks on slow machines.
Changing replayed events no longer causes warning pop ups.


🐞 Adapt accumulation of lap information to work with the new IMSA ERMon 13.13 data stream introduced at Detroit.


🐞 Adapt Pit In-Out Stints to work with the new IMSA ERMon 13.13 data stream introduced at Detroit.


🐞 Fix p1ts.com playbacks of the same event not properly clearing data for subsequent playbacks. This regression was introduced by 2-4-LAGUNASECA-1.


Handle possible IMSA ERMon 13.13 data stream enhancements.


The Stints panel has been renamed Pit In-Out Stints to emphasize that the time spans are divided by pit-in and pit-out line crossings. The User Guide has been updated...
IMPORTANT: The simplistic time division employed here, based on pit-in and pit-out, does NOT capture the changing intricacies of IMSA's drive time calculations. Also, while delayed driver plug ins during driver changes may be manually corrected by IMSA, P1TS can only rely on information available in the timing stream. You should have an additional means of calculating drive times.


During practice/qualifying, Sectors tab now automatically displays Sector Speed Distributions box plot instead of Sector Time Gaps.
Handle 2016 Rolex 24 GTD leaderboard anomalies.


P1IMSA has been renamed P1TS (P1 Timing and Scoring) for 2016.


🐞 Fix P1IMSA stuck at 08:53:47 AM when playing back Tudor Road Atlanta Warm-Up. It may not have been a problem live.
🐞 Fix Settings / Change dialogboxes for Race Gapchart Range/Deltas failed to save Min values when offline
Allow Enter key to be used to OK Settings / Change dialogboxes.


🐞 Prevent blanked Settings (e.g., Follow 2 Cars) from being overwritten with default values.


Admin-only updates.


Email Password Recovery fixed.
User Guide and Release Notes no longer require login.


The Follow car fields in the Settings tab besides accepting regular car numbers, now also accepts class names (e.g., p, pc, gtlm, gtd) to add sets of cars, and negative car numbers (e.g., -007) to remove cars.


🐞 Fix screen not updating during 8/8/15 Tudor qualifying at Road America due to T&S not clearing data after CTSC race.


🐞 Blank rows after pit stops fixed in Sector time grid for Lime Rock and Long Beach.
🐞 Pit Lane lap values fixed in Stints panel.


Annotated static track maps now available at Network / Track Maps.


🐞 Sector boxplots now more resilient to bad data.


Admin-only updates.


Admin-only updates.


🐞 Password recovery email fixes.


User Guide explains Sectors Speed Distribution box and whisker plot.
User Guide now has links to YouTube videos.
Race Gapchart pit markers and yellow flag bands display details on mouse over.


The new Sectors Speed Distribution chart uses a box and whisker plot to show the "meat" of average sector speeds for the current session as well as outliers. A second car can be selected for side-by-side box plot comparisons.


New Setting automatically changes Gapchart between Race and Sectors view. Enabled by default.


Release Notes are now available.
Welcome screen now also prompts for Green Lap Time for laps remaining calculations.
New Support application allows users to retrieve their passwords via email.
Sector and Race Gapcharts now operate more smoothly and can be manipulated offline.


Shortened driver names now include first name initial, fixing driver stints for drivers with the same last name.
Sector Gapchart now uses only 4 colors (rather than 8) when comparing the hero to the selected car. This should make it easier to compare say the hero’s working lap with the selected car’s working lap (e.g., both blue)
Sector Gapchart's numeric tables +/- now uses the same visual language as the large grid above it making it easier to determine faster or slower than the hero’s best lap sector.
Sector Gapchart's numeric table for the two cars is now separated with a blank line.


This is the P1IMSA release deployed at Daytona 2015.