<P> Despite being a surface road, with many at - grade intersections and traffic lights, some of the intersections are given exit numbers . </P> <Table> <Tr> <Th> Location </Th> <Th> mi </Th> <Th> km </Th> <Th> Exit </Th> <Th> Destinations </Th> <Th> Notes </Th> </Tr> <Tr> <Td> Battery Park </Td> <Th> 0.00 </Th> <Td> 0.00 </Td> <Td>--</Td> <Td_colspan="1"> NY 9A / Battery Place </Td> <Td> Southern terminus of NY 9A </Td> </Tr> <Tr> <Td> Battery Park City </Td> <Th> 0.10 </Th> <Td> 0.16 </Td> <Td> </Td> <Td_colspan="1"> FDR Drive north (Battery Park Underpass) </Td> <Td> Southbound exit and northbound entrance; southern terminus of the FDR Drive </Td> </Tr> <Tr> <Th> 0.20--0.40 </Th> <Td> 0.32--0.64 </Td> <Td> </Td> <Td_colspan="1"> Hugh L. Carey Tunnel south (I - 478) to I - 278--Brooklyn </Td> <Td> At - grade intersection except southbound left exit </Td> </Tr> <Tr> <Td> Tribeca </Td> <Th> 1.45 </Th> <Td> 2.33 </Td> <Td> </Td> <Td_colspan="1"> Canal Street east to I - 78 (Holland Tunnel)--Chinatown, Little Italy, New Jersey </Td> <Td> At - grade intersection </Td> </Tr> <Tr> <Td> Greenwich Village </Td> <Th> 2.43 </Th> <Td> 3.91 </Td> <Td> </Td> <Td_colspan="1"> 10th Avenue north--Meat Market </Td> <Td> At - grade intersection </Td> </Tr> <Tr> <Td> Chelsea </Td> <Th> 3.32 </Th> <Td> 5.34 </Td> <Td> 5 </Td> <Td_colspan="1"> West 30th Street to Lincoln Tunnel (NY 495 west) </Td> <Td> At - grade intersection; Lincoln Tunnel exit for cars </Td> </Tr> <Tr> <Td> Hell's Kitchen </Td> <Th> 4.00 </Th> <Td> 6.44 </Td> <Td> 6 </Td> <Td_colspan="1"> West 40th Street / West 42nd Street to Lincoln Tunnel (NY 495 west) </Td> <Td> At - grade intersection; Lincoln Tunnel exit for all vehicles </Td> </Tr> <Tr> <Th> 4.66 </Th> <Td> 7.50 </Td> <Td> 7 </Td> <Td_colspan="1"> West 56th Street / West 57th Street </Td> <Td> Interchange; no northbound entrance </Td> </Tr> <Tr> <Th> 4.90 </Th> <Td> 7.89 </Td> <Td> 8 </Td> <Td_colspan="1"> West 59th Street--Ship Terminal </Td> <Td> Interchange; all northbound commercial vehicles must exit </Td> </Tr> <Tr> <Td> Riverside South </Td> <Th> 5.29 </Th> <Td> 8.51 </Td> <Td> 9 </Td> <Td_colspan="1"> West 72nd Street / Riverside Boulevard </Td> <Td> Northbound entrance only; exit closed on July 8, 2007 </Td> </Tr> <Tr> <Td>--</Td> <Td_colspan="1"> NY 9A / Henry Hudson Parkway north--Bronx </Td> <Td> Continuation beyond 72nd Street </Td> </Tr> <Tr> <Td_colspan="6"> 1.000 mi = 1.609 km; 1.000 km = 0.621 mi <Ul> <Li> Concurrency terminus </Li> <Li> Incomplete access </Li> <Li> Tolled </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th> Location </Th> <Th> mi </Th> <Th> km </Th> <Th> Exit </Th> <Th> Destinations </Th> <Th> Notes </Th> </Tr> <Tr> <Td> Battery Park </Td> <Th> 0.00 </Th> <Td> 0.00 </Td> <Td>--</Td> <Td_colspan="1"> NY 9A / Battery Place </Td> <Td> Southern terminus of NY 9A </Td> </Tr>

Why is there traffic on the west side highway