We have recently discussed the obligation of the parties to provide for the attendance of witnesses upon the trial dates as assigned. State v. Michaels, 34 Conn. Sup. 514. In the present case the only excuse suggested by the defendant for his failure to arrange to have his expert present was the fact that at the start of the trial two days earlier a substituted information was filed charging a violation of 14-80 (d) instead of 14-283 (h) which the officer had originally cited.

State v. L'Heureux, 166 Conn. 312 (1974) State v. Chapman, 34 Conn. Sup. 514 (App. Sess. 1976) State v. Brown, 172 Conn. 531 (1977)