Here is a small sample of raw car-speed data, converted to engineering units from the microcontroller's memory. Each entry corresponds to a car passing the detectors. Length, speed and acceleration are calculated based on leading and trailing edges of the car passing each detector. Acceleration is assumed to be constant. Entries for things statistically extremely unlikely to be a car (based on apparent length, acceleration, and speed) have been removed. (Ideally this wouldn't be necessary but the detector picks up bicycles, pedestrians, stray footballs, and other strange things which shouldn't be in the road, but are.) Time is in seconds from start time, in this case Monday 4/25/94 21:48:38 PST. This data is excerpted from a longer run which lasted until Wednesday 4/27/94 21:58:18 PST (about 48 hours). -john beale 2/7/95 -------------------------------------------- direction abs. time speed accel length (boolean) (seconds) (mph) (m/s^2) (meters) -------------------------------------------- -1 115.494 21.08 0.6352 4.054 -1 131.096 26.36 0.5324 4.493 -1 325.921 20.98 -0.0718 4.256 1 415.904 24.63 -0.4145 4.648 -1 489.779 22.49 -0.1536 4.240 1 557.151 30.65 -0.5993 4.509 1 585.297 27.54 -0.5946 3.764 1 619.992 22.83 0.1156 4.368 -1 704.188 13.80 3.3736 5.064 -1 766.019 20.84 1.4785 3.440 -1 818.737 21.08 -0.2947 4.606 1 908.652 27.31 -0.3157 4.036 -1 1019.342 20.93 0.2792 3.628 -1 1025.558 22.64 0.1870 4.032 -1 1135.708 23.01 -0.4612 4.592 -1 1205.953 25.21 1.1303 3.833 1 1226.678 18.12 -1.0145 4.094 1 1240.912 16.63 -0.2015 4.447 1 1261.324 20.16 -0.2571 4.221 1 1361.099 21.41 -0.9004 3.765 -1 1386.757 20.80 0.9714 4.620 1 1420.279 21.99 -0.4212 4.081 1 1487.636 24.55 -0.0380 4.715 -1 1517.463 20.67 0.6910 3.893 -1 1607.554 23.56 0.0927 4.675 -1 1613.171 26.46 1.2794 4.329 -1 1882.634 18.50 -0.2082 4.790 1 2047.879 20.65 -0.3065 4.336 1 2058.735 22.46 -0.3150 4.085 1 2105.887 28.64 0.0000 3.757 1 2182.147 24.95 -1.2051 4.599 1 2227.231 22.39 -0.3344 3.597 1 2253.775 25.01 -0.2416 5.577 -1 2281.429 21.13 1.1260 4.220 -1 2287.032 19.72 0.3549 4.169 1 2373.595 20.79 -0.9196 4.620 1 2394.602 20.05 -0.8396 3.866 1 2478.522 24.26 -0.6205 3.986 1 2582.594 23.54 -0.0660 3.895 -1 2663.707 23.12 1.1803 4.170 1 2739.807 24.38 -0.5285 4.397 -1 2823.633 22.48 -0.1913 3.820 -1 2904.184 27.28 0.7692 4.765 1 2929.263 26.55 -0.8291 4.548 1 2938.530 25.64 0.3274 4.090 -1 3052.481 23.12 -0.4327 4.365 1 3090.911 24.11 -0.8389 4.562 -1 3282.759 21.67 0.5357 4.452 -1 3420.826 22.97 0.1515 4.481 1 3529.281 23.17 -1.1911 4.008 1 3664.195 26.29 -0.9207 4.332 1 3703.795 28.81 -0.6866 4.124 1 3904.353 25.16 -1.6243 3.494 -1 3910.242 23.18 -0.2188 4.199 1 4085.849 28.87 -0.0534 3.941 1 4188.052 25.00 -0.7615 4.561 1 4344.160 25.06 -0.0958 4.753 1 4426.182 26.60 -0.9191 4.487 -1 4449.573 27.95 0.2746 3.779 -1 4521.300 18.06 0.2841 5.247 1 4714.591 33.34 -0.0559 4.350 1 4839.184 17.31 -0.6625 4.160 -1 4857.749 20.79 -0.5547 4.086 1 4961.744 30.72 -0.9760 4.237 1 5006.436 20.22 -0.3745 4.414 1 5058.728 25.59 -0.0451 4.138 1 5184.296 33.70 -0.3058 3.570 1 5313.395 18.81 -0.2301 4.113 -1 5487.639 24.56 0.2161 3.790 1 5495.599 22.52 -0.1731 4.697 1 5536.696 23.73 -0.3453 4.420 1 5552.195 20.83 -0.7861 4.298 1 5576.156 25.71 -0.5822 3.897 1 5699.019 23.02 -0.0578 5.800 1 5992.223 22.71 -0.8406 4.287 1 6027.664 26.30 -0.4564 3.895 1 6104.878 31.02 -0.4125 3.764 1 6136.042 32.63 -1.2487 4.092 1 6148.445 21.55 0.4070 4.180 1 6183.805 28.58 -0.4563 3.793 1 6256.935 27.13 -0.9222 4.265 -1 6345.016 19.78 -0.6881 3.512 1 6677.876 30.21 -0.0739 4.467 1 6793.733 23.27 -0.4488 4.233 -1 6847.674 27.52 0.3736 4.410 -1 6964.514 19.63 0.9813 4.484 1 7230.321 31.97 -0.7507 4.176 1 7300.597 29.42 0.3044 4.316 1 7350.397 32.25 -0.5374 4.464 1 7440.492 21.19 -0.9007 4.271 -1 7614.631 18.29 -0.0919 4.334 1 7783.450 27.24 -0.0264 3.774 1 7936.756 20.61 -0.1552 4.323 1 8264.419 25.82 0.0661 4.304 -1 8301.010 24.98 0.5038 4.877 1 8455.796 20.91 -0.1899 3.974 1 8462.553 25.39 -0.3148 4.336 1 8570.055 27.09 -0.4895 4.125 -1 8577.695 25.70 0.2716 4.224 1 8727.652 28.00 -1.1280 4.233 1 9113.478 22.29 -0.2745 4.082 1 9374.268 24.87 -0.4282 4.134 1 9652.892 22.50 -2.8102 3.977 1 9729.206 22.68 -0.1024 4.022 1 9789.213 20.88 0.5380 3.973 1 9838.530 34.31 -0.2988 4.130 1 9966.452 25.51 -1.1462 4.376 1 10055.737 21.55 -0.6810 4.299 1 10139.321 22.43 0.2276 3.654 -1 10322.421 22.79 0.0731 4.581 1 10380.639 23.65 -0.3504 4.102 1 11188.112 21.18 -0.4426 4.073 -1 11270.617 30.45 0.2118 4.258 1 11343.931 26.61 -0.6892 4.324 1 11475.014 31.26 0.4635 4.305 1 11565.648 21.03 -0.3105 4.121 1 11860.996 29.97 -0.8378 3.988 1 11912.938 23.04 0.0442 3.824 1 12067.691 26.69 -0.0995 3.902 1 12411.848 23.35 -0.2274 4.804 1 12563.017 27.39 -0.4529 4.089 1 13205.377 20.93 -0.5726 3.857 1 13873.072 22.06 1.2331 3.888 1 14007.730 23.02 -0.5538 4.103 1 14461.562 26.60 -1.2109 3.882 -1 15070.539 19.43 0.1336 4.299 -1 15263.179 21.85 -0.3163 5.176 -1 15316.023 20.05 -0.5174 4.095 1 15524.321 28.19 -0.2588 4.313 1 15955.898 26.18 -1.6964 4.197 -1 16092.519 26.04 0.5931 4.330 1 16268.593 23.04 -0.3093 4.268 1 16320.752 28.37 -0.3132 3.903 1 17170.421 27.67 -0.3648 4.606 1 17362.532 25.59 0.1512 4.375 1 17395.947 32.91 -0.1648 4.341 1 18176.405 19.36 -0.0163 4.330 -1 18428.864 26.84 0.6987 4.248 1 19283.510 21.16 -0.4014 4.123 -1 19732.395 23.88 0.7538 3.882 1 21072.506 28.82 -0.4588 4.246 1 22094.504 33.64 -0.7065 4.183 1 22281.624 19.58 0.5784 4.128 -1 22507.901 28.84 -0.2558 4.061 1 22730.877 28.96 -0.3521 4.124 1 25047.942 24.23 -0.2365 4.426 -1 27662.743 22.46 0.6998 4.052 1 28606.048 25.27 -1.8530 4.190 1 28860.180 19.55 -0.9496 3.932