Esko Prague is acommuter rail orS-Bahn system, part of thePrague Integrated Transport (PID), serving the city of Prague and the surrounding areas of theCentral Bohemian Region. Train lines that are included in the PID system are labeled by letterS (or R) and a number, e.g. S1 or S88. On these lines, PID tickets can be used. Selected Long-Distance Trains such as R9 - R26 are partially integrated.^[3]

Esko Prague
Overview
Locale	Prague andCentral Bohemian Region
Transit type	Commuter rail
Number of lines	30 (starting in Prague)
Number of stations	392 (45 in Prague)
Daily ridership	137,890 (weekday)[1]
Annual ridership	39,448,000
Website	PID Trains
Operation
Began operation	2007
Operator(s)	Czech Railways,[2]cs:ARRIVA vlaky,cs:KŽC Doprava
Technical
System length	1,183 km (735 mi) (160 km (99 mi) in Prague)
Track gauge	1,435 mm (4 ft 8+1⁄2 in) (standard gauge)
Average speed	54.7 kmph

It has been in operation under its current name since December 9, 2007. part of the Prague Integrated Transport system serving the city of Prague and the surrounding areas of theCentral Bohemian Region. It is primarily operated by theČeské dráhy.

The system was significantly improved after the completion of the so-calledNové spojení between southern and northern parts of the system in 2008.

( ) = section with limited service only

{ } = section not part of the Esko-System

Since 2011 December, almost all local tracks in Central Bohemian Region were involved in the Esko numbering (some lines were enhanced and 13 new line numbers assigned). Three lines are interconnected with lines ofRegioTakt Ústí nad Labem Region: S4+U4, S32+U32 and S40+U40.

The lines are numbered according to the following system: The main lines are numbered with one-digit numbers, starting east and following in the counter-clockwise direction. Then, the connecting lines (S12, S29, S41) are numbered with two-digit numbers, composing of the numbers of the main lines to which they connect. The lines named "R3" etc. are fast trains which run along the same tracks as the S-lines but still stop at multiple stations integrated into the PID system.

In the future, it is planned to improve the system significantly, mostly by building new stations on existing lines, upgrading the lines, and integrating more of the existing lines to the system. TheNové spojení 2 is a planned underground tunnel with new stations in the inner city, which will free up capacity on existing lines for longer distance services.^[4]

There are also plans to build completely new lines, such as a branch from the stationPraha-Ruzyně to theVáclav Havel Airport.

• Official website 
• Network mapArchived 2019-02-04 at theWayback Machine
• Prague-Kladno (Czech) - website of the project to upgrade the Prague-Kladno line (S5) together with building a branch to the airport