1.   And police enforcement only temporarily solves the problem.

2.   Because police enforcement has often been lax, some spots are occupied all day by cars and vans that have commercial license plates, but do not make deliveries.

3.   Achtenberg, Supervisor Angela Alioto and Assemblyman Willie Brown have offered homeless plans that emphasize outreach and social service programs rather than police enforcement.

4.   But bike riders said the problems came from overzealous police enforcement fueled by political pressure from the mayor.

5.   But other mayors are saying that public education and police enforcement usually do the trick.

6.   But the centerpiece of the effort is stepped-up police enforcement.

7.   Steering bigger and more powerful cars and exploiting increasingly lax police enforcement, more drivers than ever are treating speed limits as suggestions, experts say.

8.   The police plan, now in draft form, calls for coupling police enforcement with social services and relies on the participation of law-abiding residents.

9.   Police enforcement, greater awareness of road safety and heavier sentences for reckless driving are major contributory factors.

10.   In November, Mayor Michael R. White announced increased police enforcement aimed at panhandlers and street crime, which advocates say targeted the homeless.