How do I obtain shape of a road represented by a PlaceId - google-maps

Question

If I have a PlaceId that represents a road, how can I obtain the shape of the road to highlight it on the map? The Places API only returns a single location in the geometry field for roads.
For example given PlaceID: ChIJ8R8rpjCuEmsRKxCMhhWn9Kg
I get the following response. Notice the types field has value of "route", but the geometry field only provides single location instead of a path.
{
"html_attributions" : [],
"result" : {
"address_components" : [
{
"long_name" : "Darling Dr",
"short_name" : "Darling Dr",
"types" : [ "route" ]
},
{
"long_name" : "Sydney",
"short_name" : "Sydney",
"types" : [ "locality", "political" ]
},
{
"long_name" : "New South Wales",
"short_name" : "NSW",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "Australia",
"short_name" : "AU",
"types" : [ "country", "political" ]
},
{
"long_name" : "2000",
"short_name" : "2000",
"types" : [ "postal_code" ]
}
],
"adr_address" : "\u003cspan class=\"street-address\"\u003eDarling Dr\u003c/span\u003e, \u003cspan class=\"locality\"\u003eSydney\u003c/span\u003e \u003cspan class=\"region\"\u003eNSW\u003c/span\u003e \u003cspan class=\"postal-code\"\u003e2000\u003c/span\u003e, \u003cspan class=\"country-name\"\u003eAustralia\u003c/span\u003e",
"formatted_address" : "Darling Dr, Sydney NSW 2000, Australia",
"geometry" : {
"location" : {
"lat" : -33.8718136,
"lng" : 151.1984465
}
},
"icon" : "http://maps.gstatic.com/mapfiles/place_api/icons/geocode-71.png",
"id" : "82a04f4f0548a2e7c467b71ed9c2a3a1615dac50",
"name" : "Darling Dr",
"place_id" : "ChIJ8R8rpjCuEmsRKxCMhhWn9Kg",
"reference" : "CpQBhAAAAA4dsRcdqFcTxsVmwWs1ZWWSg9XdclQgRHhLYT2XJwEIU8BOXoS3D4cM58oNhcND-bJU7k7nmLvgHZFep405LokQpkTu0yUPQtrrgNonLRVPdLy4j9Z0M7iBpmGkPN6BuDntYu6JG9urfnIJZRdIvpibFI9QxzP7uheEnJQtI7S8Aoxth99pVl5OvyySDSfn5hIQ4Nf4YLpRjiuY34ND9qvTyBoUr24qn9M1aFa6GoO46wrfW2a12DA",
"scope" : "GOOGLE",
"types" : [ "route" ],
"url" : "https://maps.google.com/maps/place?q=Darling+Dr,+Sydney+NSW+2000,+Australia&ftid=0x6b12ae30a62b1ff1:0xa8f4a715868c102b",
"vicinity" : "Sydney"
},
"status" : "OK"
}

Answer 1

This functionality is not supported. What you can do is create a map on MyMap and add a driving route for the path you want to highlight. Then, you can save it and export it as a KML layer. If you wanted to do this programmatically, you could use the Directions API to get the polyline for the route.