Dear Dr. Gridlock:

I have been to most major cities in the country, and the one common feature is interstate highways through the middle of the cities. East to west and north to south. Washington and Baltimore are the only exceptions I am aware of.

I remember seeing the original layout of Interstate 95 and it went right through Washington, not around it. I say, put that highway back where it belongs. Also, connect Route 50 to Interstate 395 to help solve the east-to-west problem.

Gerry Ridgeway

Severna Park

I-95 was designed to go through the city, but city leaders didn't want it. So the road money was transferred to the Metro system. Who is to say that was a bad trade?

Is it better to have cities compartmentalized into interstate grids, like Los Angeles, or simply cut in two, like Atlanta, where the state capital and the Martin Luther King monuments are only a few blocks away from each other but are divided by an interstate highway?

There is little chance that I-95 will now be routed through the nation's capital.

Police Behavior

Dear Dr. Gridlock:

About 6:15 p.m. May 4, I was driving in stop-and-go traffic along Bladensburg Road toward New York Avenue in the District. At one point, as traffic slowed to a halt, the car ahead of me pulled through the intersection of Bladensburg Road and Rand Place NE, and I stopped before the intersection so as not to "block the box."

I looked in my rearview mirror to see where a honking horn was coming from and saw directly behind me a District police officer in his cruiser, gesturing as he honked that I should pull up so he could make the right turn onto Rand Place.

As traffic ahead of me had not moved, I put my hand out the window and pointed over the roof of my car to the prominently posted "Do Not Block the Intersection" sign. In response, he turned on the cruiser's flashing lights and blared the siren as he continued to gesture.

Luckily, at almost the same moment, traffic moved and I was able to pull ahead without having to ponder whether to stand on principle.

Two blocks later, the same cruiser pulled out in front of me while turning back onto Bladensburg Road from T Street and then turned into the gas station at Bladensburg Road and New York Avenue to stop at the convenience store there.

Some kind of doughnut emergency, I suspect, caused him to abuse his authority to beat a couple of blocks of traffic and encourage a law-abiding resident to break the law.

Steve Daigler

Annapolis

Are you a confrontational driver? If a police officer gestures to move ahead, I'd do it pronto and save the lessons about not blocking the box.

Give police the benefit of the doubt. Assume that they are responding to something and that the apparent doughnut stop is really an officer looking for a suspect. That's my way of coping with police activities that seem not in character with police work.

Dangers of SUVs

Dear Dr. Gridlock:

I would like very much to start a dialogue in your column regarding the prize-winning book "High and Mighty: SUVs -- The World's Most Dangerous Vehicles and How They Got That Way." The author documents reasons purchasers of SUVs are considered by the automotive industry to be egotistical, paranoid, gullible saps who are at the mercy of the millions of dollars spent on marketing.

The book presents crash data showing that SUVs are more hazardous to their occupants than are large automobiles, such as the Crown Victoria.

A huge percentage of the advertising revenue of The Washington Post Co. comes from the automotive industry and automotive dealers in this region.

Companies selling SUVs are killing people as surely as the tobacco industry, the asbestos industry and, very likely, the cell phone industry.

Dare we forget the legacy of the Pinto and the Corvair? Dare you take on this travesty?

Peter Whitehead

Alexandria

According to the book jacket, "High and Mighty" shows why SUVs:

* Are no safer for their occupants than cars.

* Have worse brakes than cars.

* Are especially poor choices for teenagers to drive.

* Have a rollover problem that goes far beyond the failures of Firestone tires on Ford Explorers.

The book is written by Keith Bradsher, formerly the New York Times bureau chief in Detroit.

My biggest complaint with SUVs is that their higher headlights strike other drivers at eye level and can cause temporary blindness. Also, from what I've seen on the rollover potential, I wouldn't want my teenager in one.

Your thoughts on SUVs?

Law on Right on Red

Dear Dr. Gridlock:

Concerning your advice to give a simple, short toot for those not turning right on red where permitted [Dr. Gridlock, May 6]: I remember reading that right turn on red is permissible but not mandatory. In other words, one does not have to turn right on red but can wait for a green light or arrow.

As a result, whenever I am behind cars that are not turning right on red, I do not honk, even briefly, figuring that the driver might be uncomfortable making the turn.

What do law enforcement authorities advise for drivers behind cars that do not turn right on red where permitted?

Rany Simms

Fairfax Station

It's not a question of law, because there is no law that requires a vehicle to turn right on red. One law enforcement source I talked with said he usually gives a slight toot in case the motorist is daydreaming. That's what I do, too.

Dear Dr. Gridlock:

The law that permits a right turn on red does not require it. Only the driver at the intersection is in a position to determine whether the action is safe.

Honking at the lead vehicle usually does not help, because the most natural response is to look behind, not forward.

Barbara Peters

Annandale

Transportation researcher Diane Mattingly contributed to this column.

Dr. Gridlock appears Sunday in the Metro section and Thursday in Extra. You can write to Dr. Gridlock, 1150 15th St. NW, Washington, D.C. 20071. He prefers to receive e-mail, at drgridlock@washpost.com, or faxes, at 703-352-3908. Please include your full name, town, county and day and evening phone numbers.