X0201 4 2004-04-08 1 0000853695 DIGITAL RECORDERS INC TBUS 0001276530 TRANSIT VEHICLE TECHNOLOGY INVESTMENTS INC 0 0 1 0 0001277214 CHU Y PING 3306 KINGSTON DR RICHARDSON TX 75082 0 0 1 0 Common Stock 2004-04-08 4 S 0 1000 9.13 D 356600 D Common Stock 2004-04-08 4 S 0 500 9.15 D 356100 D Common Stock 2004-04-08 4 S 0 2000 9.16 D 354100 D Common Stock 2004-04-08 4 S 0 2000 9.17 D 352100 D Common Stock 2004-04-08 4 S 0 2000 9.2 D 350100 D Common Stock 2004-04-08 4 S 0 3000 9.21 D 347100 D Common Stock 2004-04-08 4 S 0 2100 9.23 D 345000 D Common Stock 2004-04-08 4 S 0 1900 9.25 D 343100 D Common Stock 2004-04-08 4 S 0 8700 9.3 D 334400 D Common Stock 2004-04-08 4 S 0 500 9.31 D 333900 D Common Stock 2004-04-08 4 S 0 800 9.32 D 333100 D Common Stock 2004-04-08 4 S 0 900 9.36 D 332200 D Common Stock 2004-04-08 4 S 0 2900 9.37 D 329300 D Common Stock 2004-04-08 4 S 0 1800 9.38 D 327500 D Common Stock 2004-04-08 4 S 0 200 9.4 D 327300 D Common Stock 2004-04-08 4 S 0 600 9.42 D 326700 D Common Stock 2004-04-08 4 S 0 4400 9.45 D 322300 D Common Stock 2004-04-08 4 S 0 6100 9.5 D 316200 D Common Stock 2004-04-08 4 S 0 1000 9.51 D 315200 D Common Stock 2004-04-08 4 S 0 4000 9.55 D 311200 D Common Stock 2004-04-08 4 S 0 400 9.56 D 310800 D Common Stock 2004-04-08 4 S 0 500 9.57 D 310300 D Common Stock 2004-04-08 4 S 0 200 9.58 D 310100 D Common Stock 2004-04-08 4 S 0 1700 9.6 D 308400 D Common Stock 2004-04-08 4 S 0 200 9.61 D 308200 D Common Stock 2004-04-08 4 S 0 300 9.64 D 307900 D Common Stock 2004-04-08 4 S 0 800 9.65 D 307100 D Common Stock 2004-04-08 4 S 0 5000 9.7 D 302100 D Common Stock 2004-04-08 4 S 0 900 9.73 D 301200 D Common Stock 2004-04-08 4 S 0 2810 9.75 D 298390 D By: /s/ Damon D. McDonald, Chief Operating Officer, on behalf of Transit Vehicle Technology Investments Inc. 2004-04-13 By: /s/ Damon D. McDonald, by power of attorney, on behalf of Y-Ping Chu 2004-04-13