Zombies in Lansing

From Ananova.com comes this report:

Police chief ready for zombie attack
A US police chief has stockpiled chainsaws - in case his city is invaded by zombies.
Police lieutenant Bruce Ferguson says his team are ready for any attack on Lansing, Michigan.
"We have been doing mock disasters and cross training for several years," he told the Lansing State Journal.
"People can feel confident, if zombies start invading, we'll know how to close the streets. We can get chainsaws too.
"If a swarm comes in on I-496 westbound, we'll block off the exits so they miss the city."

I have mixed feelings about this. I am glad the chief is preparing for the necropalypse and recognizes the dire need to do so, but don't know about the efficacy of his tactics. How are roadblocks going to slow the living dead and keep the city safe? It's not like zombies are swayed by road barriers when there are meatsnacks on the other side with tasty brains. I guess it might help during the initial panic when the unready panic and flee in their cars, sometimes bringing infected loved ones with them in the back of their minivan. Once the horde of undead is big enough, that Police Chief better have a plan B. Like stockpiles of ammo, food, fuel, the ability to grow MORE food that matches the numbers of the protected population, and VERY stout barrier around his jurisdiction that resists zombies AND the uninfected brigands fighting for survival on the OUTSIDE looking to victimize and plunder what he, and his village, has.