Tapp-Harper said volunteers would be nice, but officers with enforcement power are needed for traffic control at 26 corners from Roland Park to Druid Hill Park.

"We have to make sure the intersections are covered for everyone," she said.

Potential parking problems

Of more immediate concern is a ban on parking.

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Spevak said police have told residents to move their cars by 10 a.m., and the Department of Transportation says 9 a.m. He said he's still not sure which is correct.

"I think the safest thing for folks to do is get their cars off the road the night before," Spevak said.

Spevak said the civic league and Bmore Streets for People are rushing to spread the word before the ciclovia starts. Volunteers handed out fliers to all residences on the route, as recently as Thursday, Spevak said

"I was handing out fliers last night," he said.

Organizers also arranged for residents to park for free in the south parking lot of the Rotunda mall, the parking lot at Johns Hopkins University's office building on Keswick Road (formerly the Zurich building), and the parking lot at The Castle, a retail and office center in the old Northern District police station on Keswick Road, Spevak said.

Spevak said the civic league asked the city to allow residents to keep their cars on the street, but that city officials said no.

Spevak said he also alerted community group presidents in the area. He said some residents have expressed concern about not being able to grocery shop during the event, but that he asked them, "Is that important enough to not have this event?"

Spevak said people who have questions about parking should email civic league member Rita Walters at ritawalters@gmail.com or Rob Bennett of Bmore Streets for People, at robdesign@gmail.com.

Healthy lifestyles

Spevak stressed that the debate over police presence is secondary to the excitement that the ciclovia is expanded to communities that have not had one before or ever seen one. He said organizers hope eventually that it will become a monthly or even weekly event around the city.

A ciclovia is a way of promoting healthy lifestyles and alternative forms of transportation.

"It's a way for the whole community to be healthier," Spevak said.

This week's ciclovia will include bike tuning and a bike safety rodeo, among other activities. MayorStephanie Rawlings-Blakeis expected to be on hand at the Roland Park Shopping Center at noon.

In conjunction with the ciclovia, Friends of the Roland Water Tower will host another Tunes @ the Tower festival from noon to 3 p.m., with live music, food and bike decorating. City and state officials expected to be on hand include several City Council members and State Del. Shawn Tarrant, who helped win General Assembly approval of a $250,000 bond bill for restoration of the tower.