Most Consecutive Entrances with No Exits (and vice versa)

[webny99]

Most freeways that I can think of maintain a pretty good balance of entrances and exits, with most exits followed by an entrance aside from the odd half-diamond interchange or parclo (or other interchange configuration) with a 2-1 split.

But sometimes, things get a little quirky. I-390 south of Rochester is one example, where northbound at Exit 16 there are two exits followed by four consecutive entrances: Exits here followed by 1 2 3 4 entrances.

So what other examples are there? Is there anywhere that can beat four, or does this section of I-390 hold the official record?
And what about the reverse: most exits with no entrance? There's probably quite a few with three exits, but what about four, or more?

[sprjus4]

I-895 in Maryland.

Northbound has 6 consecutive entrances without any exits, starting at its southern terminus I-95, and not including that ramp itself.

Southbound has 7 consecutive exits without any entrances, starting just south of the tunnel.

[SkyPesos]

4 entrances without any exits between exits 1D (US 50 West) and 2 (Harrison Ave) on NB I-75 in Cincinnati.

6 entrances without any exits between exits 134 (I-93) and 131 (Cambridge St) on WB I-90 in Boston.

[Dirt Roads]

I remembered all those the feeders into the Lincoln Tunnel from the Manhattan side (at least 7 of them), but unfortunately there is a left-hand off-ramp to 39th Street that crosses the on-ramp from the same street. 

[thspfc]

US-51 NB in Wausau, WI has consecutive exits for WI-29 west, Sherman Street, and WI-52/Stewart Avenue without an entrance.

[Great Lakes Roads]

After the "Last Exit Before Toll Bridge" (Exit 1) off-ramp on I-65 SB, there are three consecutive entrance ramps heading SB towards the bridge in Jeffersonville, IN.

[TheStranger]

The setup for the Metro Manila Skyway really fits this thread (especially the original Stage 1 of this road, which was primarily designed to feed commuters into Makati in the mornings and to suburbs at night) -

From the Alabang interchange north to Bicutan, there are three northbound onramps and three southbound offramps.

Further north, the northbound direction is ultimately slated to have 3 offramps in a row with no corresponding northbound onramp (Sgt. Rivera, A. Bonifacio/EDSA, NLEX), of which the latter 2 are already operational.

[webny99]

I-895 in Maryland.

Northbound has 6 consecutive entrances without any exits, starting at its southern terminus I-95, and not including that ramp itself.

Southbound has 7 consecutive exits without any entrances, starting just south of the tunnel.

Wow, that's incredible. Going northbound you literally cannot get off anywhere between I-95 and the tunnel toll plaza. You're pretty much committed to the tunnel once you get off at I-895. I'm surprised I've never noticed that before.

There's something similar (but less extreme) going on with the southern end of I-295 in Maine. Southbound has three consecutive exits, with no entrances at all between US 1 and I-95. Northbound also has three straight entrances, but it's a little less impressive because there is an exit to the Turnpike approach.

[Great Lakes Roads]

I-895 in Maryland.

Northbound has 6 consecutive entrances without any exits, starting at its southern terminus I-95, and not including that ramp itself.

Southbound has 7 consecutive exits without any entrances, starting just south of the tunnel.

Wow, that's incredible. Going northbound you literally cannot get off anywhere between I-95 and the tunnel toll plaza. You're pretty much committed to the tunnel once you get off at I-895. I'm surprised I've never noticed that before.

There's something similar (but less extreme) going on with the southern end of I-295 in Maine. Southbound has three consecutive exits, with no entrances at all between US 1 and I-95. Northbound also has three straight entrances, but it's a little less impressive because there is an exit to the Turnpike approach.

Oh, here's another one: I-90 (Chicago Skyway).

Once you get off of the Dan Ryan Expressway heading EB, there isn't another exit until you pass the toll plaza. 5 entrance ramps prior to the toll plaza and two exit ramps after the toll plaza.

It's reversed going the other way: once you pass exit 0 for Indianapolis Blvd on the Indiana Toll Road, there isn't another exit until you pass the toll plaza. 2 entrance ramps prior to the toll plaza and five exit ramps after the toll plaza.