X0201 4 2004-03-19 0 0000350868 ITERIS HOLDINGS INC ITRSA 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M 153 E 53RD ST 55TH FL NEW YORK NY 10022 0 0 1 0 Common Stock 2004-03-19 4 S 0 11000 3.4 D 2170153 I By Limited Partnerships This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Cayman Fund, L.P. (Cayman) and Special Situations Private Equity Fund, LP (PE), respectively. 452,553 shares of Common Stock, 208,300 Wts A and 208,300 Wts B are held by Cayman and 634,300 shares of Common Stock, 333,350 Wts A and 333,350 Wts B are held by PE. The interest of Marxe and Greenhouse in the shares of Common Stock owned by Cayman and PE is limited to the extent of his pecuniary interest. Austin W. Marxe 2004-03-23 David M. Greenhouse 2004-03-23