...but do have a smartphone; I have been having fun with a new app called Ulysse Speedometer
on my Evo 4g. I just need to figure out a way to mount it now. I just activate it and leave it in my pocket at the moment.
There is a free version but I paid the $2.25 for the Pro version. This way I can track and send my results. Here is a link to my morning commute this morning.
The app can do a lot more like:
• Speed Edge GPS Speedometer.
High-accuracy* GPS-based speedometer that shows the real speed of your car in mph, km/h or knots. And for each speed unit you can define an individual gauge range.
• Maximum indicated speed is 1900 km/h / 1160 mph / 1000 knots.
• Speedometer overlay.
Small speedometer stays on the top of active application. Try It mode for 2 weeks. Unlimited in Pro.
• Three shortcut pages: Application, Communication, Navigation for a total 18 user-defined application shortcuts (36 in Pro version).
• Average Speedometer.
Tap Compass to switch to Average Speedometer, long press resets Average Speedometer for new measurement.
• Speed warnings.
You can define up to 10 speed limits. The application will notify you visually and with an alert sound when you go over any of them.
• GPS Compass.
Insensitive to electromagnetic fields and the iron of your car.
• GPS Altitude.
Reports altitude, measured by your phones GPS.
• HUD mode.
Mirrors the numbers so you can place your phone under your car's windshield and see the speed reflected on it in the dark.
• Racing meter.
Measure and calculate time for standard performance measurement distances: 0-100 km/h, 0-60 mph and for 1/4 mile.
• Log different trip parameters.
Display time and distance for current trip, accumulated time and distance for all current trips, yesterday, last week and last month.
• Trip Meters list.
You can also save any Meter on SD, or send it by e-Mail (Pro only).
• Separate limits settings for km/h and mph units.
You can easily switch all limit settings when traveling beyond the border of your country.
• Customizable UI color.
• Car dock support.
Application automatically starts and exits on docking and undocking.
• Car Mode Home.
Activate Speedometer using HOME button when phone in Car Mode. You also can use "Forced" mode if your car dock doesn't handles autoswitch into Car Mode.
• Battery status indication.
• Background mode.
When activated, the application still works in the background. All logs keep counting time and distance and the application will notify you when you exceed the speed limit as usual.
• Display speed in status bar.
In background mode, the application will show current speed in the status bar and even gives visual notification for speed limits! **
* depends on phone hardware.
** in case of system overloading, a small lag is possible.
- Trip distance may have 2-3% deviation from car's odometer data.