Bail was set at $1.75 million for 29-year-old Keith Campbell after Monday's arraignment. He his facing three charges of homicide by vehicle and other offenses.
Witnesses told police Campbell crossed the median into opposing traffic while speeding before crashing into the SUV early Wednesday.
Three people were killed. A fourth suffered a broken pelvis and other injuries.
Two of those killed were members of a string band that had performed in the annual New Year's Day Mummers Parade.
Campbell, of Bear, Delaware, is charged with three counts of homicide by vehicle in the deaths of Dennis Palandro Jr., Joseph Ferry and Kelly Wiseley; one count of aggravated assault and related charges.
Palandro's wife remains hospitalized.
Last week, police in Delaware said Campbell was involved in a brief pursuit there before officers broke off the chase.
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