Don't leave home without it

I had a dry run of the first section of my commute to work yesterday in the evening. It's relatively flat, despite having to go from the west side to the east side by way of Granger (I haven't yet rode home this way). The part I was wanted to go over was from E71st St. to E79th St. Most of the way the lanes are either wide enough for two cars; basically an unmarked 4 lane when there aren't a lot parked cars. Also, the speed limit is 25mph through that section, and people seem to stay pretty close to it.

On the way back home, I figured out something that I should always remember to keep in my seat bag on the commute:



More details to come. :)