S-train
The S-Bahn is the name of hybrid urban-suburban rail systems serving a metropolitan region in German-speaking countries. Some of the larger S-Bahn systems provide service similar to rapid transit systems, while smaller ones often resemble c ...
network in
Copenhagen
Copenhagen ( or .; da, København ) is the capital and most populous city of Denmark, with a proper population of around 815.000 in the last quarter of 2022; and some 1.370,000 in the urban area; and the wider Copenhagen metropolitan ar ...
. It is one of the base services on the network, running every 20 minutes from about 5:00 to 0:30 every day, and every 10 minutes from about 6:15 to 19:00. It runs between
Hundige
Hundige is a suburb southwest of Copenhagen. The town has a relatively high rate of crime, most of which are committed in the large housing project called Askerød in the northern part of the subur The housing project called Gersagerparken has als ...
and
Hillerød
Hillerød () is a Danish town with a population of 35,357 (1 January 2022)Køge radial. During daytime on weekdays, every second train continues from
Hundige station
Hundige station is a station on the Køge radial of the S-train network in Copenhagen, Denmark. It is situated close to the WAVES shopping center.
Hundige station opened along with the extension of the Køge radial from Vallensbæk station to Hu ...
to
Solrød Strand station
Solrød Strand station is a station on the Køge radial of the S-train network in Copenhagen, Denmark. It serves Solrød Strand, in the northeastern part of the municipality of Solrød, and serves as the extended terminus of service A, with ever ...
. On Friday and Saturday nights there is also a 30 minutes service throughout the night.
History
Since the first part of the Køge radial opened in 1972, letter A has been used for the principal service on its inner part. Before that time the most constant characteristic of service A was that it ran on the Klampenborg radial in the northern end of the system.
Ax, K, A+
Until 2007, separate service designations were used for trains that reinforced the basic service on the Køge radial in high-traffic periods. This was in part because they had their own stopping patterns, and in part due to the then-current doctrine that a service letter such as A must not be used for more than exactly 3 trains an hour. The first supplementary service was the rush-hour Ax which started running when the first phase of the Køge radial opened in 1972. It was upgraded to the daytime K service in 1992 and quickly renamed to A+ in 1993.